As Kincaid says, it's harder to be a remote decker, technomancer, or magician in SR5 than it was in previous editions (I'm looking at you, Grounding).
To my mind, these archetypes now have strong incentives to join the team, for deckers and technomancers (arguably) the direct connection advantage is significant when facing host ratings that exceed device ratings, and magicians require line of sight for a lot of things. There's a case to be made for support characters like riggers and summoners to not necessarily join the team directly, and since they would have spirits and/or drones representing them I very much agree with the comments Kincaid made that they are for all practical purposes still involved in the game.
One of my favourite character concepts for SR4 was a drone rigger driving a souped up government-model SUV (aka getaway car) from the rigger cocoon placed in a smuggling compartment, with four heavily modified, armed and armored Renraku Manservant-3 drones occupying the front and rear seats ready to either follow the team and/or protect the vehicle. It had a very distinct Elysium feel to it, similar to the spacecraft that gets shot down in the film that carries two drones tasked with protecting the principle.
The bigger concern to my mind is the rigger or summoner who gathers up a small army of drones or spirits, as this can quickly get out of hand.
All of that being said; just sit down and have a straight up talk to your players before this becomes an issue if you think there's a chance it might. Clearly lay out your expectations, and discuss the topic with them if they have an issue with your expectations and come to a mutually agreeable solution. To quote one of the many passages from published adventures where a team might not want to take a particular job:
"If the player characters refuse to take the job, regardless of these suggestions, you may want to discuss with your players what it is about the job that they object to, and find a mutually satisfactory solution"
I personally believe there is no obstacle that cannot be overcome through dialogue where this game is concerned.