I own the MFK700 and the OF1010, both of which come with 1/4" and 8mm collects. The bits I use the most in the MFK700 are made by Festool with 8mm shanks. For the OF1010, Festool makes all the LR32 bits with 8mm shanks. However, here in the USA some popular shelf pins only come with 1/4" pins, and the most available brad point bottoming bit is made by CMT with a 1/4" shank. The OF1010 is also a marvelous router. All of the bits such as round-overs, within the range I use with a 1000 watt router have 1/4" shanks.
I do own an OF1400. It can safely use 1/4" shank bits, but since I also own so many OF1010 which can perform the same jobs, I keep the OF1400 in reserve for 1/2" shank bits not needing the power of the OF2200.
I own 2 OF2200, which I only use with large bits requiring that power. In my experience using bits smaller than 1/2" shank in a router more powerful than 1400 watts is not prudent. I assume this is why Festool does not ship the OF2200 with 1/4" and 8mm collects.