That's kinda what I thought on the GPU, but how fast does the CPU need to be?
No idea about the new models, but I bought a $170 Lenovo Yoga fall of 2017 and it still works great after 5.25 years The only reason I bought the brand was because it had bigger speakers than most tablets. It lives on the kitchen counter and is used to watch video and store recipe books. The only other tablets I've had were bargain ones that became too slow to be useable after a year or two.
No idea how it would perform for games and such or how up to date/secure the OS is. It really depends on what you plan to use it for.
EDIT: I looked at the system info on the tablet. It's still on Android 6. Last security patch level is Sept 1, 2018 which is 13 months after I bought it.
So...not much in the way of continued support.