NAS solution recommendations

An extended family member is looking for a NAS solution. I run a completely DIY solution since I'm a knowledgeable Linux user. They're not. I'm trying to figure out what's available and what to recommend. Here's what I have so far:

• TrueNAS SCALE (Debian based, UI)
• OpenMediaVault (Debian based, UI)
• Synology (??, UI)
• QNAP (??, UI)

I think that the proprietary solutions like Synology and QNAP are less desirable due to unknown longevity of the companies and their willingness to support their products with software updates. Am I wrong?

I have no idea what's better between TrueNAS and OMV. I know Debian so I'm confident I can force either to listen via terminal if I have to.

What do you use? Which one of the list do you prefer? Any other Linux-based additions to the list?