I am still somewhat early in my “career”, but when I get interviewed, I almost hear someone nitpick about my internships and how I have had to change companies a couple of times.
I was working on call with a freelancer as my supervisor for a year, then went on to transition to office jobs, where they were either contractual or short term internships.
I didn't think of leaving as a bad thing. Most of it was just to look for more experience to get better at my job or the contract just ends. Worst cases it was because the employer was visibly abusive.
But somehow, because of my naturally short internships that I took to gain experience are now used against me in job interviews to justify paying me $20/hr. which ain't bad but not great. Considering I have a 5 year degree.
The only time I want to say I truly “voluntarily” job hopped was this year when I was at my $20/hr. job as a contractor and was offered a fulltime job for $60,000 a year. Of course I accepted, I practically had 6 years of experience that started while I was still in college.
I wish employers judged you based on merit and skill rather than what's on your resume.