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I only choose to buy hardware that I can connect to Home Assistant, because I can still use it if the company goes bust or no longer supports it. I have one dashboard in HA that manages all my different devices. Point is, I still buy the hardware and the sale is made. I’m not going to buy 5 different standard products which must all be managed through separate apps. Open standards can open up to a much bigger market. There is good reason why so many OEMs opened up to the Matter protocol.
But as I say, I check first for compatibility, then I narrow my choices from there. So yes, right now your company’s IOT product won’t get onto my radar. Been there, done that, and got a handful of dead paperweights to show for it.
QOwnNotes (https://github.com/pbek/QOwnNotes) may be an option as it is pure Markdown and need not have both the code and preview windows open. I used it before moving to Obsidian. It has some options to customise its window views, but it is a long time since I used it, so not sure if it has that block mode you want. Logseq I seem to recall worked with blocks as it is an Outliner that does save in Markdown format, but I did not like that the outline blocks added characters to the file format that slightly broke compatibility with standard Markdown formats. But blocks was Logseq’s strength.