PC = about 50. Between 5 & 10 installed or played "regularly" somehow.
TGX16 = less than 20, gathering dust in a box. The daughters wanted them, they got it.
TI99/4a = more than enough, some of which coded (but not distributed by Hasbro or any other corporate scams created to strip away talent and ingenuity from real programmers) by yours truly; Psyclon, HoneyBees!, Chexx, etc. Call it the crazy 80's of takeovers for profits and workforce layoffs.
Ownership of freewares & sharewares count?
PC = waaaaayyyyy above 100, some of it PAID for and registered.
Licensed of anything?
PC = a vast majority interpreted as such by implicit Laws of the industrialized theft by pricing & commercialization developped to abuse consumers.
Gaming is fun. Money is rare. Piracy kills.
It's not what you own, it's what you pay or being overcharged for through Bank interest rates. Cars & Houses, included.