Gas is the way to go for pinpoint control of the cooking process. As to the difficulty in achieving a simmered sauce, you have to play with the controls a bit and monitor your sauce every few minutes. Eventually, a setting will be found that works for that particular sauce/pot combo. Cooking
is an art, after all.
I like the "idea" of induction cooking:
1. no radiant heat emitted by the unit
2. safe for little hands or clumsy people in general
3. fast
4. its very "high tech" and modern nature appeals at an aesthetic level. i.e. "it's cool"
The problem in practice is the cost of the unit is such that the alternatives almost always look good. Natural gas is available pretty much everywhere around where I live and even if one doesn't have access to gas, the flat top stoves still win out on price.