Yup, each way, so 50mi/80km total per day perhaps a little more since I'd be going on side paths instead of on the highway.

I used to go about that fast on my old 11mi/17km commute and finish in 30-45 min, depending on wind direction. So with some training, I could probably do my new commute in ~1.5hr each way. It's not going to be a regular thing, just a goal I have. Maybe I'll do it more regularly if I get an ebike, and I probably will if I like the route.

For the train route, it's 3mi/5km to the stop, then 7mi/11km to my office. That's pretty reasonable, and I'll use that to train myself up to the full distance (e.g. skip a stop, then skip the train entirely). My office only has one bus that goes to it, and it's awkward to get to. If I did transit only, it would take >2 hours (car is 30-40 min), so the bike is a time savings.