There are three factors in my mind:
1. Processing power/price
2. Algorithms the require the power
3. Usage/Packaging of those algorithms
In the not too distant future, the chips in the Stryfeca will need to be updated (or already have been). There will be an engineering cost to make these upgrades, but then you’ll have more power and speed available. This can resolve the single algorithm issue that they currently have. You can’t do two modulations on the Mobius, the Timeline can’t do detailed multitap tape echo, etc. (The Nightsky and Volante show where more processing can go)
From an algorithm standpoint, they definitely have a “sound”. For the most part I like the sound, but others criticize the Strymon sheen. However, from a technical standpoint they can always model and simulate the next layer of depth for even more realism. I have no idea if that means a revision to the current dBucket, dTape, and reverb algorithms or just tearing them up and starting over fresh but the power will be there.
For the packaging side, Boss, Line 6, Fractal and others have bundled stuff together, made it bigger and smaller, etc. An all-in-one Helix style grouping of all the algorithms makes sense, but by the same token of you get the compressor, two drives, iridium and stryfecta today, that’s over $2500. What would the market bear for a Strymon Helix? They pay that much for a Fractal AxeFX, so maybe it will?
Also from a functional standpoint you’ve got MIDI on the Riverside and Sunset, it seems the next revision of the small pedals would include MIDI across the board.
The final thing to think about is that they are a small company with limited resources. Boss/Roland and Yamaha/Line 6 have a ton of money and people to throw at stuff. Strymon needs to hit their shots or it could be a pretty big hit for a failure.
I’m always interested in what they do next though.