When has Microsoft ever been reliable? This is a company that makes a new UI for Windows 11 and strips the taskbar of half its functionality for the launch version of the thing, then tells their everyone who asks for that functionality back to go **** themselves.
Microsoft and its employees have absolutely zero incentive to give too hoots about reliability, or customer concerns, or literally anything because their stranglehold on productivity software (I.E. Office) and Identity (AD) gives them an unshakable monopoly in enterprises and governments. That drags along OS sales, cloud sales, and even hardware.
They don't need to care about what their customers want, so they don't. Just look at the history around this MacOS OneDrive thing. It's been utterly broken for some time now, and when was the last communication from Microsoft about it? Where are the repairs? What's the timeline? Are they going to restore all of the old functionality, or leave it in the half-finished state that it is?
Nobody knows.
Nobody knows because Microsoft doesn't care enough to even keep us in the loop, let alone actually fix the problem. And they won't care because they have no incentive to care. Each and every one of us can stop using Microsoft anything right now, hold a grudge against Microsoft for all eternity, and it won't impact their bottom line at all. The only people they need to care about are people holding CxO titles in organizations with more than 10,000 employees, and by the time any of us have risen to that level in our careers the people responsible for throwing us under the bus will have retired.
Microsoft isn't reliable because they have no incentive to be. And they won't be reliable any time in the forseeable future.