My experience is this.... I used to have a Droid Incredible 2. After just under a year, the charging port broke. Happily, my local VW store had a wireless charging back for the DINC2 and a charging mat in stock, so I bought that.. and life went on.
I'll never own another phone that can only be charged one way.
I'd prefer to have a swapable batter, but given the price and all the other stats of the Nexus 4, I can live without that.
I use the same Verizon charging mat with my Nexus 4 -- it's my primary/nighttime charger.
The mat was, I think, $35... and given that I've used it for 2 years on two phones, that's cheap.
To me... it's how many times a day do you plug in a charger? How much does the phone get moved around with the charger in? All that plugging in and movement is stress to the port. Wireless charging is really an inexpensive backup/insurance policy to prolong the life of a phone.
K