It's a bit sad there's no class that actually gets incentives to switch weapons on the fly (beyond Melee and Ranged weapons). It'd be a cool concept. The sort of walking armoury Fighter that uses a hammer here, then switch to a sword for that move and then finished with a axe chop. Maybe one capable of throwing weapons, no matter the type, as a bonus
A "Right Tool for the Job" Fighter. I kinda played one in 3e, mainly because there was a dearth of magic weapons in that campaign, so I used different weapons for the bonuses I could eke out, for small tactical advantages in the situations, and, of course, for damage types or materials to overcome resistance - sometimes by trial and error, vial Full Attack and Quickdraw.
A 4e era DDI-Dragon article also had a Fighter build like that, it's at-will power, for instance, did something slightly different depending on the group of the weapon you used at the moment. Combine that with inherent bonuses, and you'd have a fighter incentivized to switch weapons on the fly.
Combat Style, in 5e channelizes your fighter's options from 1st level, though not as profoundly as Weapon Specialization did back in the day.
At least, as magic items aren't assumed, you could have a campaign where there'd be less incentive to always use the same weapon.
so they're just littering the battlefield with discarded tools and picking ones up from the fallen enemies etc. It's a cool image.
Same 3e campaign as the above fighter, there was also a fighter-cleric, also with quickdraw. So we were both prone to drawing a weapon, finding it didn't work on the monster either, and dropping it to draw another. We also both tended to collect weapons from fallen enemies, especially throwing weapons. I had quite the collection of javelins, and, on a few occasions, I picked out, say all javelins from a specific orc tribe we'd fought, and used them on a raid, not bothering to retrieve them, to sow a bit of confusion as to who was responsible. (When it was 3.0, I'd done that with goblin javelins, too, but then, y'know, 3.5, weapon shrinkage.)