There's a bunch of issues depending on who you ask.
They have FanBoys and Haters, Google will reveal more.
Or a quick walk through the comments section in the hackaday link...

It's been a while and the details are a bit fuzzy, but ...
My company got caught up in a punitive pricing arrangement.
Without writing a whole book on the subject, we bought one seat of Autodesk
Inventor and chose _not_ to buy maintenance -fully understanding we would
not get upgrades and patches.

Several years passed and we added a couple more staff that needed the
program.
Autodesk "policy" would not let me throw away our past version and buy
three new
seats (would have been about $15k US) They insisted that I "can't do that"
and that
"because I'm already a customer" I had to pay up all the back maintenance
fees,
pay some other penalty fee and then buy two new seats at current pricing.
The quote was $24.5k US.

It didn't make sense to me then, still doesn't. So, I'm no longer an
Autodesk customer.

In fairness, I'm not clear if that was driven by Autodesk corporate, or
something
specific to that reseller. On the plus side, I got rid of both by moving to
a
competitor product.

-Denny
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