We can probably add to that the fact that the nominated titles almost certainly started out with spaghetti code that had to be refactored, reworked, and gave maintainers nightmares in their sleep
That meant I could attach Cheat Engine to Roblox, edit memory addresses to give myself in-game cash, and inject whatever code I wanted to everyone else.
Thankfully it was sandboxed so I couldn't give people viruses.
This was probably a good decision because most of Roblox's best games from that period weren't updated to use server functions. It's too difficult.