c'mon, yall got so many Kat being gone theories but she is most likely still there
do yall even remember how shitty Dave was feeling when Panda left? Mfker BOUGHT PLANTS, and he was on edge so fucking much and that's why we got the Wardog thing (I believe that's his name) about making yourself a sandwich and being the "king of suffering"
if Kat left you would be able to easily see his facial expressions freak out if you mention her, but he's just mostly normal in that regard last time I checked
You bring up John and have Phil look at videos with him involved and you just see a man that looks like his friend just died, and you even bring up Pandalee and this man avoids it like the plague, but Kat is just business as always (i.e. Kat is making mushroom egg soup casserole salad for the 6th time this week it's delicious blah blah blah)
Not to mention that his begging would be turned up to 11 if Kat was gone, talking about losing a second stream of income, how he doesn't have time to do x,y, and z for the streams or patreon because he has to make breakfast, lunch, dinner, and every chore under the sun, and let's be frank: DSP would not be the one keeping Jasper. If DSP was a pet person, he'd have some type of pet throughout the last decade but he didn't.
I can somewhat buy the argument that Kat and DSP aren't really as close as a married couple would typically be, or even that Kat and DSP sleep in different beds and shit lol, but I think once you start to make the argument that Kat just isn't there I think you've lost the plot a little bit (and obviously I'm not saying this specifically about OP, I've seen this theory a few times already)
Now the last thing I'd like to mention before I'm hit with TMI is that Kat doesn't want to be on the streams and knowing how whipped Phil is, he wouldn't dare suggest otherwise. This man's political philosophy about the economy and whatever the fuck else has changed because of Kat. Him acting like anything even remotely sexual is an unforgivable sin is because of Kat. DSP calls this bitch "mom." Little bit of a stretch here but mothers are figures of authority and that may be partially why DSP views her as such, but nonetheless, DSP is under the control of Kat and it's really clear of that.
edit: also DSP's expression when Kat came into the room when the bankruptcy people showed up to his house, looked like a total sub there...if anybody got that clip that'd be great to post btw (hint hint)