Many tried it before us

See examples below, many top brands tried it (Dewalt, Hitachi, Black & Decker ...) and also smaller brands with some very strange and funny designs

Worx WX254L
Mansfield XT1412
Dual Drill Max
Topcraft / Mastercraft
TDTD - 1800 K2
Silverline
Quick-Flips Set
Quck Flip Halft Time
Drill / Drive
Bosch / Skill
PSR-SELECT
Black&Decker
FS1800D
Cobit BitJoe
HITACHI
Drill & Driver
In all this cases you are limited till maximum 2 tools and in some cases you need to a buy a complete new machine...