I haven't seen any non-Insteon switch that has anything close to the 8 button SwitchLinc. There are several places where I use all 5 actions of a 6-button, ie the main on/off + 4 buttons. If it were really compelling I could probably be persuaded to install two switches, though obviously it would be a bit of a faff to cut holes in wall etc.
What *would* be nice is a multi-action switch that has actual on-off buttons instead of an on, an off and four toggle buttons. Nice would be switches that are purely controllers and completely separate dimmer/contactors.
Of course, appropriate quality listing - in the US & Canada I guess that means 'UL Listing' - is essential. My insurance (and probably yours) would not pay out if a non-listed device set fire to the house.
[MODERATOR NOTE]: split this off from the original post and created a new topic.