I’ve only tried Solid for 5-10 mins whenever I needed something quickly off the play store (need to download mixplorer from XDA), so maybe I haven’t seen everything Solid does. But a few key features of mix that I like:

• App organisation - apks, install, uninstall, view system, etc
• Seamless root support
• Tabs that can be saved
• A less hand-holding experience throughout. The UI generally stays out of your way

Yeah, truly nothing holds a candle to this one. The only drawback is closed source code

Portal 1&2