For most of the space age, a small payload had two options: wait years for a slot on someone else's mission, or fund a dedicated launch it could not possibly justify. Shared rides removed that choice by treating launch capacity as inventory to be sold by the kilogram on a published schedule. The effect on mission planning has been larger than the effect on price.
A regular cadence lets an operator plan hardware, staffing and customer commitments around a date rather than a hope. That changes what is fundable. Reporting on the sector, including the launch manifests tracked at the launch coverage on this site, shows how many operators now design to a launch window instead of designing first and searching for a ride afterwards.
Sun-synchronous orbits became crowded precisely because they are the default destination for shared missions. That concentration is convenient for Earth observation and increasingly awkward for collision avoidance.
When the orbit is given rather than chosen, propulsion becomes the differentiator. A small manoeuvring capability lets a satellite move to a useful local time or phase itself within a constellation after separation, turning a generic drop-off into a specific position. That is why so many small platforms now carry modest electric propulsion that would have looked like overengineering a decade ago.
End-of-life disposal remains the weak point. A shared ride puts many objects into the same shell of space, and a satellite with no way to lower its orbit stays there for years after it stops working. Regulators have tightened expectations, but compliance is uneven and enforcement is slow. The cheap launch that made a mission possible does not pay for its removal, and until that cost is priced in, the crowding gets worse before it gets better.