The last time I bought a manual was about 15 years ago. I don't shoot or reload any new cartridges that have come out since, so I don't see the need in buying a newer one. As for the Lee manual anything you buy from Lee has the instructions, so why do you need them in a manual also. AS you also state most of the powder companies have their powder data available on the internet.
I've looked at newer manuals, but I don't see that there is really anything new and worth the money.
Just my opinion