Well shucks the core definition of the word "mercenary" means one who is acting out of self-interest rather than loyalty. The only thing these MFs are going to do now is look for work.

There were many senior leaders on the flight: Prigozhin, Utkin (early founder, commander), Chekalov (economic & security leader), Makaryan, Propustin, Totmin, Matuseev (all various commanders). While this seems super dumb to have all these folks on the same flight at the same time, apparently they were. With this much senior leadership now suddenly gone, the Wagner group may be struggling to get their own house in order before they can take organizational action.

I don't expect them to do literally anything. Wagner is now dispersed across Belarus, Russia and Africa; those in Belarus and Russia don't have their heavy equipment anymore (taken away after the coup). Their leadership is decapitated, the two most important people in the PMC are dead along with several other higher-ups. The coup from 2 months ago wasn't endorsed by the whole PMC, it's been estimated that Prigo had only around 8k people with him - so today you should expect even fewer to rebel.

The "best" they might be able to achieve is some terrorism. But they're not trained for terrorism, so for them it's probably best to keep their heads low.

Who'd expect a band of former criminals reborn anew as war criminals to have any loyalty? So long as they get to be out there pillaging and raping they will be kept happy and as loyal as such a band could get.

This is the second phase of Putin taking control of Wagner. Their response will very likely be to follow his orders so they don't join Prigozhin.

Prigozhin shouldn’t have held his breath wondering when Vlad would strike, but he definitely should have flapped his arms after it happened.

With not willing leader to take charge it is probably not going to happen, especially after Russia took most of their gear. They've had their chance and blew it.