I personally think Slack is a massive and underrated channel for app development. It's easy to build apps, it has tons of users, and if you can crack the enterprise egg, then it can be lucrative. Perfect use case for smaller dev teams building self-serve apps and B2B SaaS solutions.
I'd love to connect with anyone currently building Slack apps. I'd love to compare notes and get/give feedback on our processes, features, etc. If you're interested, please reply here or contact me via the contact info here (not sure how else to not promote my email too much 😅).
We're working on Phase CRM, which is a "TweetDeck" for Slack workspaces. It's been fantastically helpful in driving user engagement for the communities that use us.
Also happy to go back-and-forth publicly on the forum here if folks have already launched their apps publicly!