200,000+ windows devices issued by the company.

200,000+ phones.

Worst case somewhere around 50,000-150,000 tablets.

That leaves ~200,000 unaccounted for devices with only macOS on the table. I think the saturation is higher than you have experienced, although I'll give that it's entirely possible that the areas you worked in were not one of them.

Have you worked in those areas with high saturation ?