That basically goes away completely with tools like ffxivgardening. No one collaborates with the exception of those running that site and maintaining its database. They do all the work, and we play Simon Says.
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I think timers would be very unwieldy, as plants all grow at different rates and there are potentially a large number of plants growing under each person's care. I would love to receive a passive-aggressive message from my dying plants though :)
yeah the people that are interested join the the community/discord to talk behind the scenes to plan the website content. the people that just want the info use the site and implement it in game. still community collaboration.
there is a certain amount of out of game discussion expected with an MMO. Not everything can or should be in game.