I was downright careless with my old Nokia, and it never failed. I kept it a long time too.
Capitalism has convinced you you need a new, thin, expensive, fragile smartphone every 2 to 4 years. You didn't break your old one, miraculously. So why is it a slow piece of shit now? Did you change what you do on your phone all that much in 2 to 4 years? Aren't you still just messaging and scrolling social media?
Use your PC mostly for e-mail, documents, and social media? Maybe hanging on to digital photos? Maybe even editing them! Same shit you've done on your PC for decades, really. But... you need a new one? Is your old one broken? No. Capitalism just made your old one "unsupported" now! Explain to me why your spreadsheet needs more computing power all of a sudden.