Why aren't all modern vinyl releases 45s?

Thanks, the poor-sounding 33s seems to be the question at hand. I have my handful of 33s with great sound stages released across many decades (1st pressing of But Not for Me comes to mind), even if that's not my system's strong suit. Mastering is the other big consideration, I have some LPs that jump off of the speakers, while you have to crank the volume on others to get them going.

Don't have the technical knowledge to further the conversation, so we wait...

Why aren't all modern cars replicas of the Mazda Miata?

My guess is the people who sell records have figured out that there is not a big enough market for 45 rpm LPs, and that may be because the majority of us end users do not want to get up to flip LPs even more often than usual and have found that 45s are not so reliably superior to 33s as you seem to think.  Also, the producers need to charge much more for 45s, because in general it takes two discs to encode the info found on one 33, which is another reason they may not sell as well, certain pressings always excepted.

I think when it comes to reissues it has to do with the licensing agreement. When Music Matters was reissuing Blue Note jazz titles, some were done at 33 while others were at 45. 

I was incorrectly ascribing who is making these decisions. The artist would probably have to fight for anything beyond what the label offers. I have the same album on CD and vinyl, and there's hardly any difference in the layout and artistic details between mediums.

Yes, the labels are looking to make money, and that comes down to cost of production vs expected sales. The average consumer wants 33, so they're going to put their production dollars where the demand is. I guess my mind was processing the idea as an audiophile, and not as a businessman.

That's kind of the point of posting onto these forums, though.