I was just lookiing at the 50 advantages of a junk rig on the JRA page ( a number are variations of a previous one) for the first time. I see that some of those would be shared with compac cat owners such as 'self tacking''. An obvious advantage of junk is the ease and speed of adding or reducing sail as shown on the video linked from the write up. In the harbor a couple of hundred yards for the mooring I was headed to, I reefed from 200 ft of sail to 116ft in seconds just as the wind began to increase. It would have been just as quick to go down to 172, 144, 88 or 56 ft.
My favorites of the 50 might be no. 1 Ease of sailing full down wind with the sail out at 90 degrees along with less concern with jibing and no. 5 easier for an older or not so mobile person to use.
And of the "less serious 9" Less likely to spill your drink and can make you look like a more competent sailor than may be the case.
I loved my 16. I loved my 19 as originally rigged a little more and say the same about it with the new rig. Although my boat has been "converted" I'm not trying to prothletize. I love to see a variety of boats and rigs that meet all different needs. It's just hard not to share my enthusiasm and shed a little light on a rig that is continuing to develop after a couple of thousand years.