My work machine is a 2014 5K iMac that was maxed out. Great machine, still serves me well. I recently bought an M1 Max MacBook Pro for home use and to tackle some jobs that are a little slow on the iMac. Man the M1 Max is impressive (I am sure the M1 Pro is as well). It is a HUGE difference and noticeable in everyday. I am using Adobe CC - Indesign, Illustrator and Photoshop and huge huge huge speed improvements here, and really there should be when comparing to a 2014 computer. These 3 apps have M1 releases so they are optimized for the M1 chip, can't speak for other apps in the CC but the 3 I use run amazing. As others have said, the M2 is not out, but you can bet it will be faster and better then the M1, they need to give reasons for people to keep upgrading. So yes you could wait and get an even better computer whenever it releases and after a long wait. Took about 2 and a half months to get my M1 Max, hear things are slower now then they were. You will not be disappointed with an M1 computer, and the batteries on the MacBook Pro are amazing. I will rarely get down to 50% in a 10 hour day (that is not using it for the full 10 hours, but still using all 3 apps regularly as well as a Windows 11 VM).
You could get free applications
TinkerTool and Onyx and run it's maintenance routines and let reboot your Mac about once every 3 months to clear caches and maintenance routines including Spotlight rebuild!