All of the above. There are lots of other, non canal, inland waterways including the river Medway.
I quite like an electronic version and I guess distribution is easier and sometimes free. I can't see much future for print copies as has been witnessed with MBM and AA. The new online MBO seems to be doing well and is a good read.
I used to have PBO MBM and AA. Now I just have MBO on download.
It wasn't the cost, it was more the content that stopped me having AA and PBO and sadly the demise of MBM.
Good luck if you decide to launch a new magazine, I will certainly give it a try.