I've never used an all-in-one personally although family members have.
I've built all my own PCs except for two (well three, actually...my very first was Tandy pre-built...lol)
This one currently I also built myself...small form factor (NR200 case).
https://www.coolermaster.com/catalog...terbox-nr200p/
AMD 5600x CPU and Nvidia 3080RTX GPU