Earlier quoted context omitted.
A useful task isn't a fixed thing though. Everything the 2012 computer did you can still do today with the same amount of ram we had back then.
No, not if it involves a web browser. Most web sites today will not work on a 2012 web browser. The PC stopped existing in isolation, for most useful tasks now, it needs an Internet connection.
It still does all the things I want it to do, including using modern websites with modern browsers on modern operating systems (including Windows 11).
The T530 was released in June of 2012.