Some do. When I was in the E* queue at Brussels last year, I was right behind a German family who kept looking through their rather new looking passports as if it was a novelty. It felt like they'd got them just for a trip to the UK.
I'm pretty anti-brexit but I think realistically if you're prepared to spend three or four digits on flights/trains and hotels, the relatively low cost of a passport that lasts 10 years is not a factor - and it'll be useful if you need to go beyond the EEA. I think I'd still maintain a passport if we had followed through and brought in ID cards, and some of our peer countries like the US and Ireland ask if you want both (though they call it a "passport card")
If you go down to Cornwall during the summer you'll see rather a lot of German registered cars too (I gather it's due to a popular TV series shown there that is set in Cornwall)
There's getting a passport which is one thing, then there's the hassle of renewing your ETIAS every three years when it comes in (more if you have to renew your passport within 10 years) and then goodness knows how many times we will have to input our biometrics.
I read that if you hold a ten year passport from now, then regular travellers will only need to give their biometrics once, however the details are only kept for 3 years from your last visit so irregular visitors will have to keep providing those details. Could be wrong though, I do try to keep up with Schengen info!!
But at some point THIS current government - unless there's a June election which is looking remote now - is going to have to sit down with us and explain how the protocols in travelling abroad will work, and when. In all honesty many of us got through all the paperwork in order to take a foreign break during covid, this should be a walk in the park.
But leaving people in the dark seems to be the current policy which isn't good and may backfire if holidaymakers are taken by surprise. But the main difficulties will come (and we have examples already of pax being refused departure as theor passports are out of date - even though there's time remaining) with pax arriving at their destination and something will have been forgotten or not updated.
Down the line though, as alluded to, the positives will be - HOPEFULLY - faster entry both abroad and here in the UK when you just smile at a camera, with no need to show a passport at all. After all, there's more info on your fingers than ever a passport could hold!!
But, as this is about Sunak, he's got to man up and explain to all of us what's in store. Silence so far is deafening.