i used to be against this, but I think the last boxed PC game I purchased was sins original release.
Same here... my last boxed game was the Kalypso version of sins for the French localization... since Kalypso version was a lot more expensive that the Stardock one, that they have never made any localization for the patch, i have end up with a game speaking French and English !!!
Almost forget, for these last boxed game, a trip to a other country was needed because it cannot be found in any game computer store in my country and nobody was wishing to order it !!!
On the other hand, with other game, i have a good experience with Steam game who have localization... game are easy to found and order...
Only problem is the size of game... before if have no speed limit but only 60gb month transfer... with newer game being over the 15gb in size, it was becoming a problem... well, i have now a limited speed ( 2 line at 2k mbits ) but unlimited transfer ( up and down )...
Anyway, boxed version remain useful for third world country where the general population continue to use dial-up modem... by example, i am thinking of the distributor 1C that Stardock have use for russia... maybe you receive only 15$ on the 40$ sale but it is better that receive nothing or almost nothing ( only in big russian city, people have good internet connection ) because of no sale... piracy/hacking is rampant in country like Russia and not local boxed release will only improve it...
And about risk... don't say that you are afraid of taking risk... Stardock have publish sins of solar empire, a game that no other publisher was wishing to release, a game that nobody have believe in it... Stardock have take the risk and it have pay-off... before trinity, stardock have already sold over 2 million copy... today, it is less a risk that in the past because sins of solar empire is well know in the gaming world...
By your own words, majority of sins sales are from retail... is it a good financial strategy to cut of from retail when they make the majority of your sales... seem like the Impulse syndrome : "We make too much money, so we need to get rid of it"... by the way, pretty sure that Steam take is share of profit too, maybe not so much that retail but a stardock central release will have be 100% income for you... why make a new stardock central when your product end-up to need Steam...
I am really curious to know what Stardock team have be smoking lately... selling impulse, moving to steam exclusive, killing the retail... what will be the next step... Is it Stardock trying to suicide itself... each option that you wipe out lead to a lost of customer, it will come a time when you will not have enough of them for survive... it is sane for a business man to kill it main distributor? If i was holding share of Stardock, i will begin to sell them because there is something not right going on !!! Open new door for more opportunity is great ( using steam platform like for trinity ) but closing door is bad ( selling impulse, killing retails, steam exclusive )...