[vehemenz]

I don't think there's that much of a distinction.

The real difference is that a "true professional" already has the software—purchased at full price by themselves or by their employer—and doesn't need a subscription in the first place.

[acuozzo]

The biggest distinction, in my experience, is that prosumers tend to be means-focused and professionals tend to be ends-focused, so there's less zealotry and evangelism in professional circles.

[steve1977]

Also in professional circles, there's usually one or two industry standards and you just use what everyone else is using.