I think we all know what dugtrio can and can't trap by now.
I carry garde over chansey just because of dugtrio (even though chansey can be adapted to beat dugtrio) and i watch myself from having more than 1 poke that dugtrio could possibly trap but even then i sometimes can't avoid a revenge kill.
As robo said it was a whole different story with gengar around, but we came to the point where that thing is just too relevant.
You can afford to have that around when the usage is at borderline nu levels, but as of now it's something you have to teambuild for.
And it's not something you can be prepared for just by using pursuitdactyl or gardevoir, because at that point there's a good chance dugtrio already did it's job.
Having a dugtrioproof team which is at the same time prepared to deal with status, spikes, cbanders and setup sweepers and any kind of team in general while retaining a decent offensive power is pretty difficult to say the least.
When you have to deal with trappers risky plays are something you can't afford, especially in a defensive oriented meta where losing a single wall affects you so much; dugtrio doesn't only affect teambuilding but also the actual battles in a negative way (less variety when it comes to make decisions).
When gengar's ban was still fresh and the usage was tolerable one could still overlook it's uncompetitiveness, but i think we came to the point where it needs to be stopped.
Stall is already viable enough, trapping is pretty awful in general and with it's current usage we don't have any excuse left to keep it around.
Plz ban