I think tech is and was an exception here.
I'd advise anyone to read the available financial reports on any company they're intending to join, execpt if it's an internship. You'll spend hours interviewing and years dealing with these people, you could as well take an hour or two to understand if the company is sinking or a scam in the first place.
really company reviews is all that matters and even that has limited value since your life is determined by your manger
best you can do is sus out how your interviewers are fairing
are they happy? are they stressed, everything else has so much noise to be worse than worthless
For developers who work on products, getting a sense of whether the product of the team you'd be joining is a core part of the business versus speculative (i.e. stable vs likely to have layoffs) and how successful the product is in the marketplace (teams for products that are failing also are likely to be victims of layoffs) are also very important to understand.
And if your team is far from the money, what often matters much much more is how much political capital your skip level manager has and to what extent it can be deployed when the company needs to re-org or cut. Shoot, this can matter even if you're close to the money (if you're joining a team that's in the critical path of the profit center vs a capex moonshot project funded by said profit center).
This is one thing I really like about sales engineering. Sales orgs carry (relatively) very low-BS politically.
I was in a small conference room with the two co-founders, and of them hadn't seen my resume, and was trying to read it on his phone while we were talking.
Bam. I whipped out printed copies for both of them, from my interview folio.
But no "prep" like months of LeetCode grinding, memorizing the "design interview" recital, practicing all the tips for disingenuous "behavioral" passing, etc.