Are there any good ways to manage all the different chargers

My dad has a Multimaster and it's truly awesome.

Like any tool, there are jobs it is good for.

There are quite a few tasks I've found where it would have been really useful - mainly in repairs and renovations, where you aren't ripping out whole floor boards or walls or anything. Those are things where a reciprocating saw, jig saw, circular saw or even a dremel tool (a cutting wheel is always the wrong angle.) won't work well.

He used it to cut out windows of my daughter's playhouse after we put up the plywood walls, and it doesn't do a great job on long cuts like that - he was cutting blind from the inside along the studs and the cuts aren't perpendicular to the sheet (but it's covered with trim).

Shamelessly ripped off from here, looks like the primary reason why we still have "bad" screws (flat head and Phillips) is that the "better" types of screws are simply more difficult/expensive to manufacture:

The reason for the different styles is cost and torque.

The slotted head screws are cheap and easy to make. But they're completely useless for powered screwdrivers and you can't put much torque on the screw without it either slipping out or stripping the head (and maring the surface of whatever you're screwing). [Mad]

Phillips screws are self-centering, making powered screwdrivers possible. They're somewhat more expensive to produce than slotted-head. They tend to 'cam-out' easily under torque, making it hard to apply much torque. I've heard they were designed that way to prevent overtightning. However, it's not good for exposed fasteners to look stripped.

Robertson-head and allen-head fasteners can handle more torque than phillips-head fasteners, but are more expensive. Because the bottom of the hole is flat (unlike the pointed end of the phillips), there's more contact area and so it's less likely to cam-out. The robertson-head is cheaper than the allen-head, but the allen-head has six points of contact rather than 4, making it less prone to rounding out the hole.

The Torx-head fasteners solve the problem of rounding/stripping by having the flat bottom of the robertson/allen that reduces cam-out, but it has much better contact with the driving bit to prevent stripping the head. The points of the 'star' on the driving bit engage the recesses on the screw at nearly right angles, so it has a very positive contact. Torx is becoming more and more popular because of that, particularly in assembly-line work.

Because they're less likely than a phillips to be damaged when tightening, the allen (internal hex) heads are often used for exposed ('decorative') fasteners on 'some assembly required' furniture. It's also very cheap to make the allen keys, so they usually include one with the fasteners.