Yep, that's pretty important. Obviously, the older (and low-powered) versions don't need much, but the Pi3 and Pi4 need a surprising amount
of power...2.5 and 3 amps, respectively!
Yep I've found this out just in recent days, I don't own a Pi4 but noted
a different supply for it when I went looking.
I like the Pi it reminds me of the BBC Micro B I used to use as a kid,
and also the cool Microbit that is now in schools and carrying the flag for the 2020s effort with kids.