A lot of their hydrogen tech is very cool. Simple fact is though, in the United States we do not have and "are not going to have" a major hydrogen infrastructure. There was at one point a thought that we would, before battery tech improved and it looked to everybody like hydrogen was the future. Now basically the entire world minus Toyota knows better.
We already have an electric infrastructure. In most cases it can support a large transition to electric vehicles with few or no upgrades, because electric vehicles charge at night when demand is low. A hydrogen infrastructure, to create, transport, distribute, and dispense hydrogen to the population at large would cost hundreds of billions. Trillions perhaps. And so you have a chicken and the egg problem, nobody will buy a hydrogen car if there aren't hydrogen fueling stations and nobody will build hydrogen fueling stations and the required infrastructure if people don't have cars.
Electricity is everywhere though. Buy an electric car and worst case scenario you plug it into a 120 volt wall outlet and it will charge slowly but charge it will.
What you call unreliable voters, the rest of us call the American people. If you think you can rely on a voter, you've already lost. You are taking your supporters for granted, just as Hillary did, just as Kamala did. Didn't work out well for either of them.
'I'm not Trump' is not a winning strategy. Not for Hillary, not for Kamala, not for the DNC.
If you want to win elections, you have to look at what VOTERS actually WANT. And voters want radical reform. The unfortunately aren't informed enough to realize they'll get more reform for their vote in congressional, state, and local elections than in a presidential vote. But they still want radical reform from their presidential candidate, for better or for worse.
There are an awful lot of valid reasons not to like Donald Trump, but lack of reform in his messages not one of them. His very slogan, 'Make America Great Again', implies change.
People are angry. People see a system that works very well for the 1% and tolerable at best for the rest of the country, and they want that to change. They want a country that works for them. It's a reasonable ask. And since they aren't getting it, they want reform.
If DNC wants to win elections, they need to put forward some new ideas, which won't necessarily be popular with big business but will be popular with voters. Bernie would have mopped the floor with Trump had he not been squeezed out. There's a few younger more charismatic Democrats who could bring about some real positive change. They always get sidelined in favor of the milquetoast boring status quo candidate.
Look at Obama as an example. Young, charismatic, and a campaign based on reform. He didn't deliver nearly enough reform but he generally left things better. It was enough to get Biden elected...