Dinosaur here...
Same employer for ~40 years...
Don’t even have a resume...
At one loyalty to an employer was a plus.
These days however, you can stay too long at one employer, if you don’t show periodic increases in responsibility. That’s every bit as much a red flag as job hopping.
I was headed down that road until covid hit, and I found out how many people would violate my rights and treat me like a pariah just to appease the CDC and POTATUS.