Debating on whether to quit my job.

Part of the reason it's hard for me to make a decision is there are a lot of good things about my job:

- almost all the projects we work on are blue sky; no technical debt anywhere
- great teammates; people help each other out and generally there's a good vibe
- reasonable boss; he's totally fine with me managing my own schedule, and since I get my work done, he basically never questions when and where I work
- about 1 hour of corporate meetings each week
- best healthcare I've ever had; basically everything is paid for
- 3 weeks PTO & all major US holidays
- free food; generally healthy office snacks and such

So why would I want to quit this environment?

- I hardly get to code anymore. About 2 years ago, I got asked if I would mind helping spec out projects. Since then, I've moved from writing code related to projects to helping my teammates understand the business situation so they can build the right thing.
- I'm in lots of meetings. So we have very few meetings for the company itself. We have a bunch of customer meetings, though. And progressively, I've getting pulled into meetings where there's really no reason for me to be there, aside from "we should have a technical person present."
- The sales people are getting tired of turning down clients that our product isn't targeted for. So they're progressively pushing to make products in those areas. Unfortunately, I'm the only one on the engineering team has any experience in that other tech stack. Also, the team really, really don't want to learn it because it's old tech that's on its way out.
- The PM group is continuously in shambles. Turnover there has averaged 100% annually for about 5 years. Honestly, IMO, it's because they're understaffed. However, there has been 0 real motion to fix this other than talk. This constant turnover has made it so that the engineering team has had to become the knowledge base for all clients.
- My manager has put me on the management track, but has been very slow to hand off anything. I'm the team supervisor, and I have been since the beginning of the year formally. When the supervisor quit last year, it basically became obvious to me that I was considered the informal supervisor after that. However, I can't hire or fire; I can't give a review; I don't have any budget; I can't authorize time off. So what do I do now? Oh, I'm the person that my boss comes to ask about my co-workers performance for the purpose of informing promotion/termination/pay increases. That's it. I'm a spy.