Jeremy Swayman isn't quite at the same level as past Boston Bruins goaltenders... yet. The Bruins' goaltending room has been in great hands since the late 2000s, with the natural progression being Tim Thomas, then Tuukka Rask, then Linus Ullmark, and now Jeremy Swayman.
Swayman was able to spend some time with Rask before he retired, and Ullmark joined the team and took most of the starts early in his Bruins tenure. As we know, it turned into more of a partnership than a starter/backup situation, which likely wouldn't have happened if Swayman wasn't able to learn from Rask early in his NHL career.