Super pulse beam, gauss cannon, tachyon lance, SKT Cannon, T3 Cannon, Mauler Battery, Orion artillery, Arondight Accelerator, High Energy Laser, Idun beam generator, Joyuese Fractal Laser, Juger heavy cannon, Mark 9 Autocannon, Ferrocannon, Flux Torpedo, heavy disruptor, Mjolnir Cannon, Grav Drive, P9 Raala Rayblaster, Quarks Accelerator Cannon, Thrymm Artillery Platform, Uhlan Siege Laser, Whirlwind Cannon, and probably 6-8 others that arent loaded into my Omni factory yet....Also i havent included all the large mount point defence systems like the Guardian and Aegis which are more efficient OP wise then clusters of smaller modules.......not to mention all the large missile systems that have ranges from 1k to 10k.
How many mediums are there over 900? The large majority of mediums stop at 800. Also, dps wise, larges usually beat out mediums by a fair margin...some are on par, but most arent.
Further compounded by the extra range bonuses given to ship class in SS+, plus range enhancing hull mods and skills...and you can easily see why mediums are FAR outdistanced by large mounts, even if its only an extra 100 range over.(multiplied via bonuses).