I think the easiest would be to downgrade to the 350mbps plan and see if you can even tell there is a difference. If you do a lot of downloading of large files (Linux isos and steam games) those will go slower. Anecdotally, I’m a software developer who works from home and I have never felt an upgrade from my 300mpbs plan to be necessary, but I don’t download a ton of large files very often and this decision obviously takes into account my personal income and expenses.