What numbers do you have in mind?

I was paying very close attention to this world at the time, and I am confident that 90%+ of every PC that could run Win95 at the time of its release had been sold by an OEM as booting straight into the bundled copy of Win3.1.

Yes, lots of people had older PCs and got Win95 with their hardware upgrade cycle.

They were never in any danger of upgrading to OS/2 or anything else: Microsoft owned the OEM sales channel and the software ecosystem for the PC for a solid 5+ years before Windows 95.