That's kinda nuanced imo, like maybe unless you really ask someone from there, it would be hard to discern as an outsider if they went under because their engin

That's kinda nuanced imo, like maybe unless you really ask someone from there, it would be hard to discern as an outsider if they went under because their engineering team suck, or their marketing + sales team suck, or their founding team suck, or the market demand just sucks, or since it's hardware the sourcing / assembly / logistics of the product suck. The investors could suck too, if they are chasing metrics and returns at a projected timeline but the product-market fit isn't there yet, sometimes they'd pull out and see it as them cutting their losses. I wonder what your goals are, too. Like, is it to just keep it to yourself (which is entirely okay), or to try to make some money out of it while keeping things proprietary (which could open you to some challenges, as a developer myself creating the software i personally enjoy and find useful is a pleasure, but turning it into a business is entirely a different thing).