I'd build a full-fledged application that uses the fork to do something so obviously compelling today's bitcoin users would beg for it to be forked in. There's no guarantee that it'd succeed, in fact it's much more likely to fail, and if it failed it'd be expensive to me and a massive waste of my time. But, if a script upgrade succeeds without an obviously compelling application, and one can't be produced after the upgrade, then it's expensive to everyone and a massive waste of everyone's time.

If the average node runner needed payment pools, wouldn't they want them? If the average node runner needed vaults, wouldn't they want them? People don't know what they want, let alone need, but if they don't want what you're selling even after you've shown them the advantages - in a way they understand and can fully appreciate - it's your fault, not theirs. It's not the fault of other developers either, it's yours. Your theories about the maybe-valuable things some maybe-people will use aren't enough now.

Utility more often emerges than it is preconceived, but the people that appreciate that, developers, don't control the network anymore. White papers and think pieces aimed at developers won't do much good (especially if you have no political capital). At best developer advocacy might compel other developers to sell your upgrade for you, but odds are no one will sell your upgrade that you're the expert on. Your premonitions about an ever advancing ossification threat don't matter either. "I don't have time to convince you because I'll need to convince even more people later" isn't going to win anyone over.

Personally, I'd be happy to fork in CTV, CAT, VAULT, or GSR, but what a few of us want doesn't matter. If forever ossification is looming, the best thing to do is admit you suck at selling and get better at it fast. Or, just admit you aren't that convicted. Blaming other people for not doing their job because they don't see your genius, or resorting to bad faith arguments, is strictly foolish. If no salesman on earth is good enough to sell your fork, then either it isn't that compelling or ossification isn't looming - it has already happened.

If you aren't willing to waste a soul-crushing abundance of time and money building the arguments and applications, no quorum is going to waste their time imagining, upfront, what value you might theoretically give them if they just let you have your way. Changing bitcoin consensus is, by design, one of the hardest things in the world. We can't cap our sacrifice and expect we'll accomplish an upgrade.