Sibelius has similar shortcuts to play from last position, go to start, etc. To replay from the last spot as list time it’s ctrl-space (command-space on mac); not especially tedious.
However. you cannot just select a group of instruments and push p to get just those staves to sound like in Sibelius–you need to use Dorico’s mixer for that and individually solo (and later un-solo) the instruments. If you want to concentrate on Winds, for example, you just select the place you want start on the winds staves and push p. With Dorico, you need to select a note as a start point, open the mixer, solo just the winds instruments, move the mixer out of the way, and push p, and then un-solo when you’re done. Moving to brass, in Sibelius, select the brass staves. In Dorico, the same multi-step soloing of just the brass instruments. I find Dorico much more “tedious” working on Orchestral score–doubly so when it needs to be coordinated with video.