I see from Europe View in the May 2023 Modern Railways that the German Transport Minister now sees the 'Deutschland Takt' plans as taking 50 years to implement.
We shouldn't get hung up on what we can't achieve, that's letting perfection be the enemy of 'good enough'. You're never going to get major interchanges like Manchester Piccadilly and Birmingham New Street to have everything arriving from everywhere and then leaving to everywhere at the same time, it won't happen, we're never going to build that sort of infrastructure (it's hard enough persuading the government to cough up for more than the two existing through platforms at Man Picc). What is achievable is for most lines to have a service at X minutes past every hour and thus a regular can look at their watch and say "it's five past now, there will be a train to A in ten minutes" without having to refer to a timetable to check if this is the one train to B per day that skips A, or if it departs five minutes earlier at lunchtime.
What is also achievable is for connections to converge at many cat B and cat C interchanges. Not necessarily every single train together, but in many cases you can get 50% of them on the hour, and the other 50% on the half hour. At Chester the services to/from Crewe, Llandudno, Manchester Airport (via Warrington) and Manchester Piccadilly (via Northwich) all converge such that the longest connection between any of those pairs is 17 minutes or so; while services to/from Holyhead, Shrewsbury, London and Leeds also converge (there are a few longer connections, particularly those arriving
from Leeds or London but most people aren't going to be waiting more than 20 minutes). Shrewsbury concentrates most of its trains around an xx:25 node, the main exception being the Milford Haven-Manchester service. Obviously services run at a metro frequency don't matter when planning connections, they're frequent enough that
something will connect.
I think the biggest change needed is in weekend timetables. Obviously there will always be some differences, weekend timetables will continue to start later and may have a thinner frequency in areas less focused on leisure travel, but can they please make the overall concept match with the weekdays where possible? The Sunday timetable up here is roughly what the weekday timetable was before the W&B amalgamation. Great way to confuse passengers.
Finally, buses. Where you have a town with a two-hourly train service, and a two-hourly bus, wouldn't it be great if they lined up?
If we can make integrated transport work
in some places, we should attempt to implement it in those places. We shouldn't just give up entirely because we can't change every last city.