Go forward or backward (sort of)?

Go forward or backward (sort of)?

I am in my second career at 55. Same industry, different education and skill set required. I oscillated between the two in my 40s before consistently moving completely away from my first career. Jobs in my current area are more scarce but pay more, and I enjoy the work. The current employer is very dysfunctional, with turnover I’ve never seen before. They’re about to lose almost 100% of the team twice in 3-4 years. I’m doing the job of 3-4 people compared to industry peers. I have a potential opportunity to move backwards but it’d be a step towards a part of the industry with more jobs. Do I have enough runway? I hope to retire at 65ish if I can afford it but need to make what I’m making now for most of the time left to do so.