Yes. Ours goes like this:
Accumulation phase: earn a lot, spend a little, and save a pile, increase side income, pay off debts, streamline cash flow, etc. NW is probably $400K by the end, but the number isn't critical. The main thing is to get side income higher than expenditures, and we're basically there; other than continuing to max TSP/IRA/etc, all free cash goes toward minimizing cost of living (energy-efficient house, minimal debt, etc) and maximizing low-effort business opportunities.
Next spring/summer (ages 39&35)...
Partial FIRE, Phase I: quit FT work but continue my ANG career (one weekend a month, 2wks a year), or go IMA and work about a month at once each year, plus a few hours a week in real estate, primarily as the buying agent when my companies' profits are reinvested. DW goes back to freelance, 10-20hrs/wk. We travel more, but continue saving a little, let investments compound, and enjoy our free time.
Partial FIRE, Phase II (ages 42&38): in 2019 and 20, both my companies start paying out most of their profits. We Stash the surplus or dial back the work here if we're tired of it. Another 2 years, and I've locked in a reserve retirement, but I keep doing it if I'm having fun. NW hits the upper 7 figures and work becomes purely optional.
Full FIRE: whenever we get tired of the occasional work. This may be a gradual transition, and we will probably always do volunteer work. The line is blurry for me, since FIRE has always been less about quitting and more about decoupling my personal goals from the need to earn a paycheck.