In other forums the question would be reasonable, sadly here this is the forum for victims of the poor planning in this state.
I had the very strange experience of talking to a transport planner about this very issue and purely on the numbers 30+ miles is not a runner, plain inefficient use of resources. This person lived 41 miles out
. If you did that you could carry huge amount of extra people, purely on the basis of you can pack'em in to crush levels and more efficient train use. The horse bolted about 1997 way way too late now, if only the DRRTS study of 1975 was implemented (and it could have been) we wouldn't be here
Can't recommend anyone commuting by rail beyond the Dublin suburban boundary (Maynooth/Greystones/Balbriggan/Hazelhatch). We do our best if you are stuck already.
The government has put a large number of people in limbo with decentralisation, people have moved outwards on the promise (or contractual requirement) of the office moving to a certain town, hasn't happened.