When I got in this business 21 years ago, 80% of the market was six lines or less and I would guess that it is still relatively close.
I'm on voip but that is because I am paying my ISP $60 for what I used to pay SBC $120 after I switched from Verizon that was somethingover $160. The Sipura boxes feed off my same old DSL and I feed them into a Toshiba CIX 100. That is voip without all the sip stuff.
All these VOIP only systems and the Key/voip combos are going to go to 20% of the market. At least that is until you get phones with voice announce intercom, off hook voice announce, lots of buttons, etc.
There are going to be 8 line key systems manufactured for a long, long time. Adding on some VOIP capability to larger systems is happening, but not wholesale replacement of key for voip, and it won't for the forseeable future.
But then I could be wrong, I was married twice.
