"One true way" is actually something the OSR should not bother with or even reject, given that it tries to invoke a way of gaming that happened during a time where you couldn't just go online and ask and talk about a game. Playing old school D&D can mean very different things depending in what group you played in your youth. Younger RPG games probably are played much more uniform then the old D&D editions.Most people are far more reasonable about what is "OSR" and what is not, especially as not everyone played the original editions as "heists in Fantasy Fucking Vietnam(TM)." If you're heavily based on an early edition and pretty much only have relatively minor tweaks, that's good enough for me to say it's OSR, even if it's not the "One True Way" that some say is mandatory for OSR. Heck, major changes that still keep enough of the aesthetics probably count. OSR is part of D&D, and D&D is large. It contains multitudes.