> There's got to be tens of trillions of dollars in deployed methane infrastructure
Highly doubt it is worth that much presently, so even if the investment was that large (which I doubt) we certainly aren't looking at walking away from that much presently.
The big reason to move away from methane is that gas delivery infrastructure is expensive to maintain, and nearly impossible to keep leak free. Reusing existing infrastructure implies investing in its maintenance, which may be more expensive than building new infrastructure for liquid fuel (which itself already exists).
Highly doubt it is worth that much presently, so even if the investment was that large (which I doubt) we certainly aren't looking at walking away from that much presently.
The big reason to move away from methane is that gas delivery infrastructure is expensive to maintain, and nearly impossible to keep leak free. Reusing existing infrastructure implies investing in its maintenance, which may be more expensive than building new infrastructure for liquid fuel (which itself already exists).