Building the integrations is easy, if all the integration is is a notification. I've got half a dozen custom slack integrations that i've written for my team, it's no more than a day of work sunk in so far, including the infrastructure in our product to figure out who, what and when to notify.

If we need to switch to a different messaging platform, sending that same notification at a different api should be pretty trivial. And if it isn't, I don't know why we'd be switching.

Building an integration is having someone:

- deal with the target platform's API

- deal with APIs of the many platforms that are being integrated

- maintenance and SLAs

I honestly doubt you can create half a dozen good integrations that require more than just notifications in a channel (for example, PagerDuty notifications and the like).