This morning I got my 500th player commendation. I’ve kept the Battle Mentor requirements in the back of my head and knew it would be impossible to get there until Endwalker launches, but I have all the quests (1 each of Tank, Healer, DPS), 500 of 1500 commendations and 590ish of 1000 instances down, so it’s more than 1/3 but not yet 50% done. Not that I’m working towards this goal, but I’ve found it a good benchmark to measure your experience against.
When Endwalker releases this will almost surely be bumped up again, so you need to finish some max-level quests – either role-based again with 3 of 4 role quests needed like now or like it used to be in Stormblood and earlier (afaik), where you needed to e.g. finish the 70 WAR/WHM/BRD quests if you played my main classes.