@girish @nebulon For users who are using Nextcloud + Nextcloud Talk for remote, collaborative work, the two Nextcloud HPB's (the Spreed SFU/ signalling HPB + this new notifications HPB binary) are very important.
My largest (non-Cloudron) Nextcloud has 22 remote users; the Spreed SFU (available as-a-service for 40 euro per month) enables them to hold their all-hands Monday video meetings. They love the new notifications binary too because it makes the Nextcloud Talk notifications "instantaneous"... especially, when receiving a call, etc. They are now doing many group audio calls.
With these two HPB's enabled, Nextcloud is arguably the best, open source, self-hostable, remote-work collaboration tool available today. Without them....well, it great for managing files....like Owncloud, Pydio, etc.
If Cloudron devs intend their Nextcloud installation to be used for collaborative, remote work, then the notifications HPB binary needs to be enabled by default. It requires a decent amount of of server-side jugglery.