If I were you I'd probably just buy another 2020 Corolla or if I was feeling fancy a 2011.

Old stuff is your only option, imo. Almost everything in the last decade has some kind of tech bullshit in it.

This is only tangentially related, hopefully someone else here knows, are the newer fleet vehicles coming out still barebones? It might be a consideration if so

Your best bet would be to go for something used in good condition before 2014 that's when cars started being internet connected and having controls being software buttons in screens and the like. If you have a bunch of money you could try to import something but the 25 year rule is an issue if you live in the US

I see very little mention of Mazda here. 2014+ Mazda 6 or more recent 3 or cx3 are great looking and aren't all out on tech that would drive you nuts. And much more fun to drive than Toyota. Give those a look.

Alternatively, does anyone know of (a) car(s) which are easy to remove any computer systems?

Is the Holden/Vauxhall/Opel/Chevrolet Astra available in your country? I had one for a few years, tidy little car, built well, runs well. When it was written off I bought another, very happy with it.

Just switched from a 2015 Corolla S to a 2014 RAV4 Limited, absolutely love the feel and I don't imagine I'm ever going to leave the brand honestly. Toyota just makes damn good cars and they last forever. Look for good used RAV4s or 4Runners in your area pre-2016. My mechanic has swore by the engine Toyota used from 2008-2016, he says it's probably their best engine they made, and after that they changed styles.

Whatever vehicle it is ... you should get the option for rich Corinthian leather interior

I think what is a good choice greatly depends on your location, which affects prices, availability, spare parts availability etc.

I drive an Audi S4. It has issues. If it’s no more, I’d probably replace it with another unreliable German vehicle. I also drive an F150, and it has broken a few times. If it croaks, I’d probably replace it with another F150…

Why I do this to myself? No idea.

Subaru Crosstrek remains about as analog as a car can be these days. Otherwise, you have to get a Chevrolet pickup truck or something.

I switch back and forth between my 96 Tacoma with 250k miles and my 06 Scion xB with 190k miles. Love them both. Bury me in one of them.

If at all possible, consider replacing your car with an E-bike. Way cheaper, both in upfront and maintenance costs. No insurance, no gas, no registration fees, etc, etc. With the right set-up you can haul a week's worth of groceries in the rain and not even think twice about it.