I have never felt tied
Question for you. If you play a game/rule set from a company that also makes specific models for that game/rule set, do you only use the specific models or do you use whatever you want?
Whatever I want, can’t imagine not doing so. And would specifically avoid a ruleset that I thought was trying to lock me into such purchases (like Ex Ilis), and would never contemplate playing in a competition or similar which demanded it.