TL;DR: let's decrease it to 25.
And I encourage especially the high-rep users (like and including me) to vote more on new user's questions.
References
This issue has been discussed on the Main Meta site already, e.g. in Why do I need 50 reputation to comment? What can I do instead? and Lower commenting threshold to 1 rep. as pointed out by Izzy in the comments.
The suggestions there are good for programming issues, because
in many cases, a programmer can narrow down the options and then even describe 3 alternative possibilities and solve them all in his answer.
there are enough questions on Stack Overflow to gain reputation
Analysis
Above 2 assumptions do not apply to this site.
In many cases, we cannot narrow down potential options. It would just be a guess, not a "scientific" approach.
we don't have as many questions here.
Why 25?
I could bet everyone runs 2 software applications on his PC that are a bit unusual. Put those into a good (!) question, as if you were still looking for those. Then self-answer the question. If that works well, you should at least get 1 upvote on each question and answer, making 30 in total. Even with a downvote or two, you could still comment.
Other options
Find a topic in which you're good at. Ideally it's one of the bigger SE sites such as Stack Overflow or SuperUser. Hopefully you can get 200 reputation there and then benefit from the +100 trust bonus on any other site.
