There are certainly things I can do on my new laptop that was a major hassle on the old one, but web browsing, Python development and day to day sys admin stuff was perfectly fine on the old machine.
For me it's all about the screen, an 11 year old ThinkPad most certainly have a terrible screen (it might not, but most do). Getting a clear hi-dpi monitor is more important than having the latest CPU, GPU or 32GB of RAM, at least for my needs.
I have to disable third party JavaScript, and I have to be careful what software I install, but I love this machine.
I will probably upgrade to an M1/M2 for my next machine, but it’s because of software not hardware. The software, after 10 years, is finally starting to be bloated enough that I feel like I might need more soon.
Seriously, going back from a performant arm64 to x86 feels like going back to the POWER architecture all over again. Big bloated chips where every little computation generates a lot of heat and you need big fans to dissipate all of it.
I wish I could do the same, although in the lower end, with my Raspberry Pi 4. Sadly, those laptop cases for the RPi are too expensive, if you include shipping, to justify them.