Rode from somewhere in northern Italy to Nice, France. It was september, roads were very quiet, weather was mostly good (almost froze my hands right off on a rainy descent, but the rest was quite good). Slept in hotels as I only had four days and was doing like 2500-3000m elevation every day.
I would thouroughly recommend crossing the alps on a bike. I don’t know if credit card bikepacking is frowned upon on this forum, but it can be an amazing experience. 
For all the pedal pushers out there that love long distance cycling. There are no gear requirements and no 'minimum distances' here.
Have you ridden for a cheeky overnighter or a 3 year global trek? Doesn't matter, you're welcome here.
Have you got panniers, bikepacking bags or just a backpack with the essentials? Doesn't matter, you're welcome here.
Have you got the latest in carbon engineering or your dads old 10 speed from the 70's? Doesn't matter, you're welcome here.