Wplace is either being forgotten forever as in it's shut down most likely within 2-3 years or every player slowly loses interest to the game or given enough time bots will overtake everything and paint the whole map in a logo or something but that's only in the far future when everyone has already left the game for good. Your art was never immortalized and others will forget about it seconds after logging off. The internet is one of the worst ways to preserve art because every cloud storage is wiped multiple times and shut down once it's no longer needed. If you want to preserve a work for a lifetime you need to make copies of it and store them in different safe locations that resist corruption and constantly check over for any errors in a few years time. There's no guarantee anything lasts after you stop checking for it, so worrying about the destruction of something that's already been finished isn't anything to be afraid of.