I understand that the Conwy Valley service was cut from a two train service because the signalling at Llanrwst was deemed no longer fit for routine crossing of trains (although it can still be used for occasional specials). Unfortunately nobody seems willing to spend the money to renew it, which is galling considering the amount of investment being thrown at South Wales. However, I suspect the difference is that improving Llanrwst is seen as a poor return on the investment, based on the likely ridership.
There is an hourly bus service between Porthmadog and Caernarfon, and Porthmadog and Blaenau. What is needed is a connecting hourly service between Blaenau and Llandudno. However, even with trains crossing at Llanrwst, that isn't going to give an hourly service. To get an hourly train service on the Blaenau branch would need substantial investment, which frankly wouldn't be justified. It would be much cheaper to provide an hourly bus service.
Meanwhile TfW are throwing money at bus services in the area. The latest being the through Bangor to Carmarthen service. But they won't support a bus service between Porthmadog and Llandudno, despite the proven need for such a service, because it is politically unacceptable to compete with the subsided train service.
And it is politically unacceptable to abandon the train service. So it just gets the minimum needed to keep it going (although that minimum has added up to a significant sum over the years).
So us exasperated locals are stuck between a rock and a hard place, we are stuck with a train service that is next to useless, and with no realistic prospect of it being improved. If only that rubbish train service could be abandoned, we would almost certainly get a decent Traws Cymru hourly bus service in its place.
In that case, a decent compromise would probably be to bring back the T19 and run it in the hours when the train doesn't run. Not perfect - journey times won't be perfectly clockface, some local stations wouldn't be able to be served, and bus services are of course more vulnerable to regular small delays here and there, which can disrupt an integrated network. However it could work as a compromise that doesn't require either pushing some people who travel by choice back into their cars or irresponsibly throwing around £millions.
E.g. from Llandudno:
- 07:23, 10:23, 13:23, 16:23 and 19:23 rail
- 06:23, 08:23, 09:23, 11:23, 12:23, 14:23, 15:23, 17:23, 18:23, 20:23 and 21:23 bus
You'd need to clearly present the rail+bus method of working on any promotional material or travel websites, in order to explain the occasional 2h gaps in the bus service.
There'd be a few logistical challenges - such as establishing ticket acceptance across both transport modes - but that may actually be a good thing as it'd bring ticketing simplification to the region.
I don't consider either keeping things as they are, or closing the line, a suitable choice:
The low frequency of rail is an obvious drawback, plus the fact that the current timetable prevents timed connections with both the Sherpa'r Wyddfa at Betws and the T22 at Blaenau - not that a few extra buses would necessarily fix the latter problem, but a 1-per-hour Llandudno-Blaenau connection and a 1bph T22 service means that connection times won't ever be unusably poor.
At the same time, closing the line has various challenges associated with it as detailed upthread, but also there are simply a high percentage of people that are okay with 1.5 hours on a 197 and then 30 mins on a bus, but won't consider doing two straight hours on even the most modern of buses - I appreciate that the Yutongs are great buses, but at the end of the day it isn't a coach so will never really have the onboard experience suitable for 1h+ trips. Maintaining the rail service every 2-3 hours keeps these travellers happy without inconveniencing others.
These travellers are the kinds that provide growth - as you can't run a successful transport network by
only catering for those who don't drive and assuming that nobody else will bother. Push them away, and political support for an integrated rail&bus network also fades away as less and less people care about what goes on in the world of public transport. Now that doesn't mean every transport hub needs to have a multistorey car park and so on - there are a number of ways to encourage drivers to use more sustainable & efficient modes of transport which don't negatively affect non-driver travellers' experiences.