In theory I agree that having a Linux version would be nice. However, having messed around with Linux quite frequently over the years and tried a few DAWs for Linux (Ardour, LMMS) I think there are the following major hurdles:
1) Linux still has an extremely tiny share of the desktop market, so I don't know how they'd have a business case for investing in a Linux version.
2) Few hardware manufacturers provide drivers for Linux. That's not to say that the hardware won't work, but it will probably use drivers that are created by the community.
3) Very few VST manufacturers develop Linux versions. This is not an issue if you can accept using LinuxVST or other open source formats. But I would not be OK with that since I use programs like Addictive Drums and Komplete.
That being said, Ubuntu has released a SNAP package format that would probably work well for this type of thing, since it includes all libraries, etc needed for the specific program.
The biggest issue though is #1. . .