Should be noted that it's not impossible to create a game with an FTP+Subscription+IAP pricing model where IAP has a strictly limited effect on actual gameplay

Should be noted that it's not impossible to create a game with an FTP+Subscription+IAP pricing model where IAP has a strictly limited effect on actual gameplay and most of the core game is accessible either at the free tier or a modest subscription. Usually, such games are still lower quality than the equivalent game with a shrink-wrap or subscription model, but the IAP infection is more like a festering sore than the terminal cancer described in the OP.