That the pcb router software of Altium is not the best one in the world.
I am used to Allegro from Candence and although for people coming from eagle or pads or pulsonix Altium is a huge step forward...
When used to allegro and the speed and intuive functions of menus and working with the program, Altium seems a huge step backwards. Unlogical steps to take, counter intuitive menus.
Focus in the wrong windows. Access violations when using more then 1 monitor and splitting the program over multiple monitors. The inability of panels to dock behind each other, no instead they dock above each other so that no panel is usable anymore. Some functions need a press on an apply button. Other functions require an enter.
When drawing a line, multiple clicks are neededed.
When a DRC error is encountered and you cannot solve it because the track will not move, you have to disable the rules by setting it at ignore all obstacles, and then use the online drc to manually move the track around. And then set the preferences at push and hug again.
With allegro, you can push and shove easily 30 tracks at once and solve the error because allegro allows you to solve the error while the excellent hidden autorouter function solves the issues and at the same time keeps the rules in mind. Not with altium.
With altium when you have a weird error like the pcbdoc not finding any changes that can be imported, closing altium and restarting it is usually the solution.
Also, when trying to access a database. The schematic or pcb libraries will not be found until you close altium and do a restart.
Allegro is designed for speed, with altium i am constantly waiting for altium to finish.
Altium has some really nice and cool features. But i rather have speed and a intuitive user interface than a program that updates prices. We have a purchase department for that.