Bolts are better at chambering ammo that isn't factory spec - say a shoulder isn't pushed back quite enough - a bolt will chamber it with a little more push - where a pump or semi might not work right.
 
It is easy to forget that everyone hunts differently - stand hunting is very different than doing drives with a good shooter or two waiting for running deer - in which case, a semi would be just wonderful.  In the flatlands, accuracy at long range might eliminate many semis.
Back in the day, a lever could slip into the front of the bench-seat seat cover (remember those?) - and slide out so easily - I dream of a modern slim short semi rifle that could replace the old 30 30 - the AR has too many catchy places.  
Let me dream for a minute - a .243 with a tube magazine that can be loaded and unloaded easily ( and ammo added to) - slim enough to wrap a gloved hand around for easy carry ( not like bolt actions) - semi auto with a top three-position safety - total length same as model 94 - combination of notch rear sight with peep sight alternative for long range.  Hooded front sight.  Super-bright LED light in front of tube mag.  Maybe removable scope that stores in stock.  Balance point of carry is not steel ( too cold on hand in hunting season.)  Durable and trustworthy - stainless with black finish.  Might have a retractable cord sling coming out of stock to clip to fore-end.  Might have a ring at balance point to attach to belt or chest.  Should hold five rounds at least ( plugged like shotgun?) plus another five in stock.  It has to slip into a sock and out easily - no snags.  Price point 2000$.