BEV evangelists commonly steer reliability comparisons toward the drivetrain, since it in theory ought to be more reliable (at the very least it will have fewer moving parts), but I don't think my earlier comment was in an explicitly drivetrain-specific context. As you say, there are many other facets of vehicle reliability that matter.
It's also worth mentioning that modern ICEs seem to be exceptionally reliable even with the bare minimum maintenance, which makes sense given the maturity of the technologies involved. Transmissions maybe not so much, but the obvious answer to that IMO is hybrid drive systems—series hybrids, simple planetary gear systems, etc. Everything on the road today ought to be a hybrid, since they're arguably the most impactful way to distribute our limited battery production capacity. A standard hybrid battery is something like 1/100 the capacity of a BEV battery.
