There's been quite a few OS updates that have cause various problems... so yes, there is no guarantee. One OS release would cause Logic to stall motionless for over a minute (or longer) when using the analyze function of the built-in channel EQ.
Logic users are the beta test team now, you always upgrade at your own risk.
Octopi will tell you same as I will that Logic 9 on an older operating system has far better performance (almost 2x) than the latest OS/Logic release.
Professional standards are higher but Apple has turned Logic loose on the masses and it's now a consumer product. Standards, have always been lower with consumer based products of just about anything.