I agree with this, it seems good to consolidate /st/ and /stem/ into a new /ref/ or better, just /arch/ (provided it can be extended past 10 pages to hold everything) for archived /k/ and /t/ threads which hold value.
I think we should nuke /sug/. The fact that we're even having this thread on /t/ is indicative of its failure. Board traffic is slow, and its more of a "send the mods a publicish letter" than anything, since no one goes there. Having periodic meta threads on /t/ to solicit donations and bounce ideas off each other works a hell of a lot better, again, as this thread shows.
As far as board software goes, imageboards may be "dated" but the alternative is a phpbb forum which is already done to death, or just being a facebook group which is "Take all my persec" city. Imageboard is fine. The software behind it is fine. If we had the same software as 4chan now does, that would be nice, but its imo not necessary and not causing the hordes to turn away like alt.rec.guns or something.
As far as advertising and growing the base goes, I'd like to note why most of us came here in the first place. 4chan was a shitty place, suffering from constantly going down for hours, and so opchan was created so we wouldn't have to deal with not being able to shittalk other peoples choice in guns for 4 hours. Different phases of shitty moderation, floods of summerfags, etc, also helped, but to be frank those reasons are mostly gone, and even if 4chan decides to drop their /k/ board because moot got bought by bloomberg instead of 2ch, everyone would go to reddit, and vice versa. But other than that, there was the livestream, which a lot of /k/indergardeners tuned into, then followed the giant banner here, like myself, or people who had POSITIVE interactions on kinder/k/ with tripfags like Hotaru, FPoP, Meplat, and Drake and knew they resided here if they wanted more real content.
Trimming back down the boards will be a great first step in revitalization. IMO, we should consolidate further, but lets start with what we're planning now and see if that helps enough. Afterward, IMO, we really need to have a discussion about the duality of /t/ and /dmz/.
As a precursor, I strongly believe a lot of threads happen on /dmz/ which should really happen on /t/, and /dmz/ should be no more than porn/weeaboos/extreme shitposting/image hosting. Driving traffic to a visible board like /t/ would help the accessibility of the site for noobs, its ridiculous to expect people to come on opchan if they see it is dead without realizing theres a super secret hidden board we have 80% of our posts on.