Yes, sometimes markets work in sucky ways (not something I was commenting about anyway). But that's not the same thing as claiming "little functional difference" (which
is one thing commenting about).
The alternative, racing to the bottom, isn't going to work.
I've actually made no comment about sustainability.
Guerrilla marketing - Wikipedia, the free encyclopedia
"Guerilla marketing" isn't just "being tied down by the Lilliputians". (If everything is "a disruption" or "guerilla marketing", then nothing is.)
Apple is quite a different company than Garmin. The "little guys" might not make any or very much money (and there are a lot of them!). And they are competing against open source alternatives.
With what is being discussed in
this thread, you are running the GPS continuously on one or another device. So, for this discussion,
this feature is moot.