I know worpdress.com is famous and has a lot of success. However, their service and products are in fact quite average if not poor in many cases.
I created a blog twice with them, or at least I registered twice. The 1st and 2nd time, I've never ever received any activation emails. So I never could activate and create these blogs.
Of course, I tried to contact the support. But as you know, wordpress.com has no support, they only have a huge Q&A database where of course the activation problem is completely ignored.
I decided to write to their "VIP" services in order they could solve this activation problem. I did so and guess what? I never got any answer.
So, wordpress.com has no real support, if something goes wrong, you are on your own. You pay or not for it, change absolutely nothing.
Secondly: I browsed a number of website using worpress, they all have the same issues: full of trackers, scripts, useless java and very very heavy to load. On top of that, wordpress.com or any other site using their products, bugs are frequents including complete freezing (meaning if you are logged in you have to start everything over.
1. Huge technical issues
2. Activation problems
3. No support (paid or free products)
4. Too many scripts, trackers etc...
5. Crashes and freeze
Popularity leads sometimes to arrogance and growing too fast leads always to total chaos. I will go for a more caring, professional, lighter and smaller provider