Excellent product which is on the right track. In my view the pricing is too high for this stage with 5 Euro/user/ month. G Suite costs 4 euro for it's vast service portfolio. For us a price point at 1 or 2 Euro would feel comfortable.
Nuclino definitely deserves to be as popular as Slack and Trello. Like Slack and Trello, Nuclino focuses on one task and does a brilliant job at it. I really hope this stays actively maintained!