Do you use pry/prb in logstash?

Logstash offers the commands `bin/logstash irb` or `bin/logstash pry` that load the Runner class, start it, and immediately yield a command line with either irb or pry.

I'm questioning the need to still have this. Does anyone use it? What for?
On the other hand, if it's useful, can we make it better?

I've only used `bin/logstash irb` when I wanted to play with LogStash::Event but didn't want to bother knowing all the necessary extra logstash rb files I would need to load:

```
bin/logstash irb
> require 'logstash/event'
> LogStash::Event.new( .. )
```