I have to do mitered waterfall leg details on some 2 1/4" thick butcher block tops. The short pieces (less than 48' long) I can do on a sled on my table saw I suppose (old Powermatic 66) though not ideal with the blade's tilt direction
One of the pieces is 14' long , they are 14" deep. My bench my radial arm saw is mounted to only has 12' to the wall, I'd rather not dismantle the entire fence and table setup to move it. Not sure that 14' hanging off the sled on the tablesaw would go well. I could make an extra sled and large temporary side support and outfeed.
My skil saw will get me 1 7/8" deep or so on a 45 degree bevel cut, I could clamp a straight edge and cut that way and then finish with a hand saw and sand , I've done them this way before several times and while tedious they come out well. I'm not sure a 12" double bevel miter saw will have the enough cut capacity at 2 1/4" to complete the cut, I don't have one on hand at the shop to try with.
There are some inventive folks here so before I get started I thought I'd see everyone's thoughts. A smaller format sliding saw is in the shop's future...