Assuming most are talking about watching the matches on TV as opposed to flying round the world to watch, TV doesn't have to broadcast it live. In fact it would be better if you could just tune into a channel and once you do the cricket/whatever starts.
So taking out the armchair factor, is there a lot of gain to day/night cricket? I'm assuming we will ignore the environmental factor of powering the stadium needlessly with floodlights etc, and assume all attending are on local time hours ie sleep at night, wake during the day according to the host country.
So what do you gain? If we're talking 2pm-10.30pm what do you gain? The argument about people needing to travel or take time off work doesn't really work, 9-5pm doesn't end at 2pm anyway and you'd still need to travel, if you do, either way. You could do a half day, but might as well take a whole day, I've yet to do a day of Test cricket that didn't involve early morning to late evening so most of the waking day ie it's basically a long haul.
So we could argue atmosphere, well it isn't football and never will be. The artificial atmosphere of the laughable IPL would be hard to mimick in Tests anyway, and is the atmosphere TRULY any better for day night ODIs than day ODIs?!?!?!?
Nah, can't see a gain, not one that is worth breaking with tradition. Instead of focusing on the time of Tests, maybe they should focus more on the nature and structure of Tests ie get Ireland and the non-Test nations into tiers/Tests.
It isn't really about tradition, it seems to be changing something for the sake of it and trying to make it sound like it's a change for the better when it has no obvious merits or it would have been done a long time ago. I think someone just sees it as a dying format and is trying to make radical changes.
The one daft thing about day-night Tests has become very obvious, KIDS. If we want to get kids into cricket then I'd suggest late finishes would make parents unwilling to send young kids to watch it.
Could be designed to 'save' Tests and have exactly the opposite effect. A better move would be free to air TV coverage (again), the Olympics were on TV and suddenly every kid wants to win a gold medal. Only highlights are currently available in England if you don't sell your soul to s*y.
But it's all about the money, assuming the reduced exposure doesn't decrease the amount of future generations going to and watching it on TV................... Put Tests on late afternoon and night and see if that doesn't kill it off for good, I may be wrong but it is food for thought