Despite @ump's combative tone, he does back up what he's saying with links to evidence. GCN has also done one or two episodes that mostly debunk the benefits of being locked into your pedals. As far as I can tell, all the tests that attempt to prove or disprove the benefits of clipless pedals have been done on a treadmill in a lab; it may be that the benefits are amplified when riding in the real world. I know that I (unscientifically) just prefer to be locked in.
But the question is not about flat pedals vs clipless, it's about toeclips vs clipless. Between the two, I greatly prefer clipless pedals, for reasons already mentioned in this thread.
If you are riding with clips and straps, you either want a platform pedal that gives good support (these do exist), or you want a fairly rigid shoe so that you don't get hotspots from the pedal's plates digging into your feet. And if you're wearing special shoes anyhow, it's not a stretch to go clipless.
In any case, clipless pedals weren't intended to replace street shoes with toeclips, but slotted cleats with toeclips. Cleats have most of the disadvantages of clipless pedals, plus being much less comfortable (a tight toe strap can cut off circulation) and of course harder to get out of the pedal. The advent of SPDs made it practical to have clipless pedals with shoes that are OK to walk in.