The biggest benefit for me (I think) would be if the product/design people I work with could find issues and send their recordings to me. Don't think I'll be able to convince them to switch to FF though.
$0; Essential features; Up to 3 users
$50 / month; All features; Unlimited reports; Up to 10 users
...
You're right though, it can add up quickly. Do that 20 times and you're at nearly 10% overhead. It's also a big assumption that the team is salaried. It might be a team of founders, or an open source project.
Ultimately you just need to decide which SaaS solutions are most important to your team.
I also have Xcode and several other apps open.
Don’t skimp on RAM. My next computer will have 32GB of RAM. It’ll extend the usefulness by years.