[samanator]

Mainly it's what I'm familiar with. But I did try and use other CRM's (including SuiteCRM, Airtable and a few others) and didn't find the important combination of:

1) Modern UI's I didn't need to write myself

2) Automation with and transactional atomic write guarantees

3) An extensible and scalable sharing model

Although I didn't try dynamics. I'm guessing it's a suitable alternative.