I recently did a tour in Northern Italy and on my way up to Lake Garda from the Adige River, I passed a group of 8 people touring on e-bikes. I asked about them and was told that they could do about 90 miles a day before needing charging. They were on a hotel tour from Bolzano to Venice with the tour company handling their gear and charging the bikes every night.

To the extent that this allows more people to enjoy bike touring, I say bravo. The more people who do it, the money will come in and the better the infrastructure will be. As imi says, I wouldn't hesitate to use an e-bike when I can no longer do it under my own power.