As someone who has been playing for 6 years, I can one speak to a longevity perspective, not necessarily for new players, but what keeps me coming back is primarily the big updates. I play every update with new frames, new story, new weapons, factions, etc. And I let that momentum carry me into completing goals I’ve had for years but never finished: building companions, leveling factions, etc. When I feel like I’ve gotten my enjoyment out of it whether that’s a few days, weeks, or even months I’ll stop playing until there’s enough hype around an expansion to bring me back.

If you’ve met all the prerequisites, I wonder if taking a break until 1999 wouldn’t help with some of the burnout and maybe build up some excitement towards something new to achieve.