You´re half kinda technically right but that´s only half the truth.
The other half is that if the dev doesnt update in 5 years, but adds a line to his work every week (or at least says so) and posts some BS status update on patreon then yes, the game technically isn´t abandoned.
If the dev doesnt update in 50 years but keeps doing the same BS then the game technically still isn´t abandoned.
If the dev doesnt update in 250 years because he died but his grandgrandgrandkids keep on doing the same BS then the game technically still isn´t abandoned.......
But...........hehehe................. at some point any sane person has to look at the game as abandoned as it effectively is at some point, and on this site that point and the rule is after 18 months of no update the game is marked as "abandoned" and rightfully so, no matter of status updates. There shouldn´t be any discussion of that. I would even lower that to 12 months.
And lets not be naive here, the devs don´t like the abandoned tag because it´s an immediate sign of their slow development and every dev would like to avoid it because it really doesn´t look good and here on f95 are potential supporters - that´s why ICSTORE tried to game the system by releasing some status update right before his game being marked as abandoned.
Again, the "abandoned" Tag is a good thing and should be applied automatically as it´s a incentive for devs to avoid it. Not really too hard to understand.....