Wow this port to the Switch is incredible. It looks amazing and runs smooth. I've never played Warframe before on PC. But, I just started this on the Switch. Trying to get used the controls since I enabled the motion controls. Anyhow, it is free to play from the Nintendo Eshop. Just download it and play.
It's ridiculously smooth on the Switch, a super impressive port and I highly recommend it! I'm not going to play much more than I have on the switch as I've got about 500 hours across xbox/PC so I'm not adding another one to the list. Hopefully one day there can be one global account for all platforms.