Serious question. Why?
The people that support him seem to do so unconditionally. At this point, what would the abandoned tag even matter?
Yes, the supporters are generally unaffected by whatever is done or said on F95Zone.
But NOT all of them. If a supporter should somehow find this site, totally unhelped by Discord ofc, and see the terrible Abandoned tag on a game he/she/it presently supports...
In some cases, that may be enough to temporarily stop sleepwalking. Subscriptions to that game would be in danger of collapsing, or at least reducing. New supporters, especially from those are current supporters of other games, would "probably" decrease.
Without new supporters to replace "I'm out, gone!" old supporters, profitability would decrease. What Dev could/would ever want that?
I would rather stick an "On Hold" tag on any game that did not update within 3 months of the last drop. No excuses allowed.
If a Dev "generously" places the project on paused subscriptions, keep the OH tag 1 year until declaring an Abandonment.
If a Dev refuses to pause subs (that's the REAL entitlement, people!), declare Abandonment 3 months later.