When speaking g about power I meant the cpu processing power. With VNC it is possible to create a failed print by logging in from two or three systems, which here happens all the time, as I have my desktop logged in, my dedicated 3d printer laptop and using my iPad when not around. My 15€ pi2s handle this without any trouble. If you need to log out before log in from another system, a failed print (tool head stutter/pausing) is around the corner and will happening.
Have to admit, I too have 2 computers logged into my Pi 3 B+ most times. And, for sure, CPU power is very often a concern. I am still contemplating whether to get another 3 B+ or get a Pi 4. Mostly, I’m thinking about a 4 because I started using OctoLapse & it says you shouldn’t start a new print job while 1 is rendering, and it often takes quite a while. I’m figuring/hoping the extra CPU power of the 4 might speed up this process. Assuming that is the case, then it comes down to whether 8GB or RAM would be faster than 4GB.