1) Taxi's never innovate. They never change with the times. Which is what you get with any unionized industry. No change/adaptation to the industry - so they would rather whither away and die than adapt. Hostess was a great example of that in recent history - and plenty are still on-going and will die as well (Chicago teacher's union for example).
2) In relation to #1, the concept of making it easy to order a cab is far beyond their mindsets. The thought of making an App that you could pay with, tell them where to go, and call them to a location? Ludicrous! That's witchcraft! Well, at least for cab scum. Last I checked I still had to look up the number for the cab company and give them a voice phone and a time to pick me up. And don't you dare ask the cab driver to pay with your company card

They will have a hissy fit if you use a credit card.
3) As they get more and more comfy with their industry of shit, the taxi drivers don't care for things such as looking nice for customers. Not having a vehicle that smells like shit, looks like shit, etc... Also drivers are the scum of the Earth. Next time you get out of a Taxi, get out to get your bags out of the trunk and ask your driver "What is the total?" The real total will be right in your sight through the back windshield - I did this test and 90% of the time they straight up lied. I always liked it because if they did lie (usually by a few dollars) I just pay them the amount they said when I would normally tip more.
4) Yet with Uber - in a competitive, low priced market... I've had numerous drivers that were above and beyond friendly... Hell, I had one in Vegas that offerred to charge my devices, offered me bottles of water, and offered mints as well heh. I've run into tons of interesting people with recent or current careers that are actually intelligent people. Never had that with Taxi drivers.
To put it simply though, adapt or die. Taxi's don't want to adapt, thus they are forced to die. And good riddance.