Since "they" are still around and used TripOS to build a single user, multitasking computer, I would bet that blogger speculated without any research.
Speculation IS Blogging. Perhaps you're confusing a blogger with a proper old school journalist. But I suppose these days journalists are basically bloggers.
In any case they borrowed the DOS why not other elements it makes sense to me, especially considering the pressures they were under at the time. Funnily Gates was doing the same thing at the same time with Xerox.
When you look at smart phones today vendors are doing the same things with features. Even calling them similar names. Eg: Glance & Glances.
The winner is the consumer in both cases.
