You only have to change your fuel lines and maybe a few injectors/ports for that.

However, I am NOT talking about ICE , I'm talking about FUEL CELLS. There are no problems like that with them, and the tremendous efficiency of the design more than makes up with replacing cell stacks occasionally.

Like I said elsewhere, this has already become a reality at manufacturing and shipping companies here in the US. This is not a technology that hasn't become established as a good business move already!

This technology has fully matured.