For me, it's more than just waiting for the test or doing something else, it's the fact that I need to leave my flow state and keep checking back in on this one task. Merging up from dev to prod is just a sequence of waiting and checking (and doing other tasks). I think it should be as close to instantaneous as possible - and you are always free to check your email then :)
I think some developers don't care, and some developers really really care and I haven't found a good way of partitioning the set and focusing on the developers who care.
It's also a lot about who holds the buying power and what's the incentive. If I'm a developer working for a company, I probably wouldn't bother raising it up to management. Especially when it's tools like this where there are lots of questions to answer: Will it actually be faster? How does it work? Would it be reliable? What's the cost of moving?
The uncertain "faster build time" would be nice. But is it worth raising it up and battling for it? Unlikely.
I think a different case can be made if you target the managers instead. "Make developers twice as productive" might be a better selling point.
I work in an industry that integrates in the CI/CD pipeline in enterprise workflows. Speed is a concern if it really slows things down, but at the end of the day it's not the top concern at all.
Compliance, reporting, scaling with number of projects/growth, interop with existing tools, and lastly a good word from other people in the same industry are what's going go sell your product.
In enterprise CI there are a bunch of other tools you're going to be waiting on, and at least from what I've seen on the field companies will run stuff like SCA/SBOM every build and keep a history graph of when and whom added things. The developer themselves typically does not care for that, but the 'enterprise' does
You need to find the target market where a 15m delay is a pain point i.e. partitioning the set.
I don't personally know of any Devs who consider that a pain point, so it might be a really small target.
Trust me, I am going through the same thing, and I'm constantly questioning whether this yet to be released product has a big enough target market. No good to me if the alpha users comprise the entire target market, so I'm ready to pivot the moment they say "this is great, but we don't have budget/use this less great free thing/can't get approval/will sign up next year/etc".
That's all code for "this isn't a pain point for us."
Product-market-fit is about having the right product. If you consider changing the market I guess this is about PMF, but most people think about PMF as changing the product.
So, I'm trying to find the correct way to market to the developers (and companies) who really need my product.
For what it's worth, it has the core features of all the incumbents, just better. So there is a market (unless none of those companies have reached PMF).
I think some developers don't care, and some developers really really care and I haven't found a good way of partitioning the set and focusing on the developers who care.