It seems like quite a few people are getting jobs after just finishing the front end cert so I would guess that by the time you finish the back end nearly everyone will have a job by then. That would take up most of your days from then on out. Before you get the job, you’re motivated to work at it very hard, putting in two or three hours a day after work. But after you get the dev job you want, it’s probably not quite as high a priority anymore even if you want to complete it. I’d be people would drop their hours on FCC to just a few per week. Even if you kept at it at 10 hours a week though, you’re still looking at another 80 weeks to get to full stack!
Only 44 people have gotten all of the first three certs as well.