I’ve worked at a company that used both. One for development the other for support tickets.
The idea that people would use ServiceNow for development tasks is scary.
I had the opposite experience. Some in house devs are extremely talented and have (middle) management support.
(Upper management fires those groups and uses the savings to buy Atlassian)
Bit unpopular, but I actually prefer servicenows ticketing system over Jira. Although a big part of that comes down to how my team worked for a while
For a while I had to use Jira for any cloud work and ServiceNow for any dev work on that platform. Keeping track of 2 different boards is maddening