True, all of this. Most time signatures above 4/4 are compound and “irregular”
6/8 can sometimes sound as two bars of 3/4, but, often it is 4/4+2/4 or 2/4+4/4. In 5/4 you have 3/4+2/4 and 2/4+3/4, but also 4/4 and an extra 1/4.
7/4 gives you lots of possibilities, as some musicians (not only in jazz, but in folk or pop music also) know: 6/4+1/4, 3/4+4/4 or 4/4+3/4.
JackDeJohnette’s Nine over Reggae is testament to the wonderful possibilities of compound time signatures. 2/4+3/4+4/4.
In other words: triplets are not always a workaround, smile

Though maybe still rarely used, other hard- and software is already perfectly capable of catering for your odd time signatures needs (Ableton, Yamaha psr series, Cubase, Studio One etc…). Roland, Yamaha, Ketron and Korg have since long offered odd time sigs has proven. Sadly, they lack the advantages of band in a box, including the possibility of notation.

Pgmusic is focusing on mainstream music in a variety of genres and recordings of real musicians. Though wonderful and clearly appreciated by lots, it leaves a lot to be desired for the more adventurous, midi inclined musician.

Biab, Kontakt, Sampletank and lots of nice libraries, from Fluffy audio to Abbey Road drums.
Check out these great contemporary Jazz Styles: www.jazzstylezz.com