You can put a venturi on the side of your fuselage and your vacuum instruments will still be working after an engine failure! Seriously, vacuum pumps are heavy, cantankerous machines that have no business being used in the modern age. They belong in the same junk pile as carburetors, magnetos, mechanical gyros, gascolators and paper maps and charts; none of which can be found on my IFR airplane and I'm a 65 year old geezer.
On the other hand, you are entitled to your opinion and it's your airplane, so do what makes you happy and comfortable (and dated).