I've been working since my teens, sometimes many years at a job (~6 years at one, and would've stayed longer) or primary consulting engagement (10+ years). My only strong regrets about staying too long anywhere was a couple shorter situations, because they were in toxic organizations.
It sounds like you found a good situation, and hopefully you're also taking good care of your health, and pursuing a life partner and family if you think you might want that. For sustainability and/or personal development, can you find a way to grow as an engineer, and also (not the same thing) keep LinkedIn-marketable keyword skills, while remaining at your current place?
Or, by "grow as an engineer", do you mean you want to maximize your monetary wealth? If so, the most common way to do that has been to get a FAANG job. (Though that's being shaken up right now, with lots of layoffs. Also, the gatekeeping tends to be snooty and rooted in class, so being almost a decade at a much lower-paying job isn't going to help, unless it's in a niche they think is prestigious, like university research.)
It sounds like you found a good situation, and hopefully you're also taking good care of your health, and pursuing a life partner and family if you think you might want that. For sustainability and/or personal development, can you find a way to grow as an engineer, and also (not the same thing) keep LinkedIn-marketable keyword skills, while remaining at your current place?
Or, by "grow as an engineer", do you mean you want to maximize your monetary wealth? If so, the most common way to do that has been to get a FAANG job. (Though that's being shaken up right now, with lots of layoffs. Also, the gatekeeping tends to be snooty and rooted in class, so being almost a decade at a much lower-paying job isn't going to help, unless it's in a niche they think is prestigious, like university research.)