First off, thanks, I'm glad you like my lists! I often worry they aren't helpful or are confusing in how I separate Almanac from Horizon, and delineate categories within those two threads. Feedback on those though is always appreciated.
With regard to point 2, I'm right there with you. Although I think my next new year resolution will be to be ok not buying every new homebrew, and save my money for the ones that truly stand out. Anyway. Sometimes homebrews are only offered in limited quantities that unless you're in the know or in the right place at the right time, you're out of luck. It's frustrating when there is clearly a wider audience for these but the developer doesn't have the resources to make more themselves or lacks the interest to collaborate with a company that can scale up and distribute worldwide. This is why Broke Studio, among others, has been such a godsend. But this has been an especially big problem with the growing Famicom homebrew scene in Japan that has demonstrated little interest in distribution beyond Japan, and that includes not just the brewer but shops that decline worldwide shipping. Props to @neodolphinofor developing relationships with these devs to create a workaround with his NES releases of their games. At the end of the day, all I can do is be supportive where I think it's helpful in the hope that maybe devs will consider options for larger releases, but I try to understand when that's not feasible.
But the flip side to 2 is 3. I've noticed two particularly big problems here.
For Kickstarters, some don't launch a campaign at all until the game is done and just needs the funds to manufacture and distribute (which apparently rubs certain people the wrong way as not in the spirit of KS, but f them). Others launch their campaign while the game is still in development. I keep a list of all homebrews I've pre-ordered so nothing falls by the wayside, but it is disappointing when that list grows longer without some of the earliest entries coming off and delivering. But I try to dig into why that may be. Several are games I'm excited about, and the devs offer updates (on social media if not on KS), and there is a sense things are moving forward despite delays, but the truth is, this isn't their primary life and they have other responsibilities and (especially with the pandemic) I can't expect them to honor those original timelines. But other devs don't treat their audience with as much respect. I wonder if in those cases they were always like that, or the vitriol they've encountered has made them jaded. I try to be patient and respectful since you catch more flies with honey than with vinegar, but my disappointment is palpable. I do try not to be a pushover either though, there’s a guy on Sega-16 who maintains an air of “any news is good news so I’ll take this as progress” even in the worst scenarios and I hope I don’t turn into him.
Some of it is from those companies that devs use to scale up. I'm very aware (and in agreement) that several of the games you mentioned that you're concerned about are from First Press Games, though this is also a problem with LRG and SLG. I don't know enough about their supply chains and distribution networks, which I know has had an impact on lots of homebrews (like Action 53) but even before the pandemic, these 3 companies were incomprehensibly slow.
With regard to What Remains, I believe they have a deal with Broke Studio for distribution, but at the moment all there is is the reservation list. No money has even changed hands from those reserved buyers. I look forward to when that happens but am not sure when that will move forward.