There is another fairly strong, to me, argument in favor of electric outboards such as Torqeedo.
There are seasons where you use your dinghy all the time and there are seasons where it gets little use. Newfoundland has been a season where we have been tying up at wharfs and visiting small towns. Anchorages are scarce as the depths are great and are interests are more inclined to the communities than to gunkholing.
In years past, I used to hate the gas/petrol powered outboard sitting on my transom having the fuel go slowly bad and turning into varnish in the carburetor. And, yes, I always ran it dry, but gas-powered outboards just like to be used and have their fuel fresh.
With the Torqeedo, that is not a worry.
I also had my outboard serviced with regularity (and sometimes repaired): the servicing is no longer an issue and, so far, there has been no repairs necessary.
BTW, the above observation goes for dinghies as well. I have a hard nesting dinghy that rows well and is out of the way under the boom. It is largely impervious to sun/rain/dirt etc. I used to hate storing my inflatable on the foredeck for long periods unused. Not only was it in the way of sail/spinnaker/ground tackle handling at times, but it was slowly but surely being destroyed by the sun.
Further thoughts, Dick Stevenson, s/vAlchemy