The usual trope justifying the use of Presta valves over Schrader valves is no longer logical (in my opinion at least) because of changes in wheel, rim, and tire systems. Let me exemplify by refuting some points made in the 2012 question regarding the valve debate:
Daniel R Hicks: "The main thing is that the Presta valve is thinner, and takes less of a bite out of the rim. This is quite important as the rims get narrower."
Rims nowadays have become so wide, even for road bikes, that this fails to be a major issue. Perhaps back when rim widths were like 15mm or whatever it was indeed a problem, but with most new road bikes coming with 19+mm rims and MTBs 25+mm, the difference in valve hole size is much less significant. What's the difference between say, a 19mm rim with a Presta hole versus a 21mm rim with a Schrader hole?
Daniel R Hicks: "Further, the Presta works better with hand pumps in that there's no spring that the pump needs to overcome to get air into the tire. Also, the Presta always has the fully-threaded body (which is possible with Schrader, but rare), so a nut can be used to hold the valve in place -- again, quite important with hand pumps."
Hand pumps can be designed to press the valve core, and fully-threaded Schrader is easily manufacturable.
geoffc: "Presta makes more sense on higher pressure tires, since it allows you to pump in higher levels with a floor pump"
The trend of wider tires means that average tire pressure has lowered, so few cyclists still need to be able to pump 100+psi or whatever. This is a total non-issue for mountain bikers anyways.
cyclo: "Another advantage of Presta valves is they can be made longer, a lot longer in fact than Shrader valves."
A non-issue if greater manufacturing capacity is switched to Schrader.
You get my point.
Additional points in favor of Schrader include the possibility of gas station pumping, greater availability of spares at auto shops for example, stronger valve, stronger valve core, greater internal diameter for injecting tubeless sealant, better flow of air for tubeless installation, etc.
So why are modern bicycles still being sold with Presta valves?