While it's not officially supported you can use nvmes to run containers. I do this on my own nas and it works great. See https://www.reddit.com/r/synology/comments/1gobb14/guide_how...

That said, the person you're replying to is right. Synology has mostly stopped supporting their apps, they've removed features in cost-cutting features (media codecs), hardware is now hopelessly outdated and both kernel and docker are completely out of date.

It feels like any technical leadership completely disappeared and now only bean counters who don't understand the product or their target market are making decisions.