There is no debating that the light output of a strobe is much more than a speedlite lol. It just seems that there are a lot of people that think speedlites are completely inferior to strobes. If someone really wanted to they could easily overpower the sun with speedlites much like what a person could do with a single AB1600. It is all situational, so I just think trying to discredit one or the other is just dumb.
But, if someone REALLY wanted to, they could have tons of speedlites to compete with what a strobe would do, and be able to put them in a backpack.
There's no modeling light on a speedlight. You may be able to survive without one for other types of work, but for product photography it's pretty much vital. Also, ganging a bunch of speedlights together when they are only a few feet away from the subject is definitely awkward to say the least.