Benefits:
Lighter/ simpler workload in terms of having fewer children with severe learning needs/ behaviour issues
Longer holidays
SENCO role often part-time
Drawbacks:
Higher number of children with dyslexia
Parents more reluctant to accept their child has additional needs (other than dyslexia)
Parents who accept that their children have additional needs sometimes expect you to be able to 'cure' them. They place too much importance on results and need constant reassurance that, yes, their child could go to a top university even with dyslexia, dyspraxia, etc
Parents who accept their children as having additional needs expect far more support than they would receive if they were in the state sector but this is difficult as...
Not as many TAs/ LSAs, and smaller budget for resources/ support
SMT not keen on having children ('officially') assessed
SMT not keen on you informing parents of their children's assessment results
Occasionally a lack of understanding on the part of SMT about how additional needs may affect child's ability to produce work to a particular standard
Longer school day
SENCO role often part-time
..from (bitter) experience