Why are caucuses antiquated?

The original purpose of the caucus was to inform and educate in rural areas back when newspapers did not circulate into those areas and there was no access to radio or, later, television. The caucus in its original inception was a means of informing and discussing, not just casting votes.
Today, where virtually everyone who chooses to has access to radio, television, Internet and printed news, there is little need to inform or educate. Caucuses are simply an antiquated, party-controlled means of voting.

So, why do I say it is antiquated? The need to inform no longer exists. Further, the caucus disenfranchises many voters. Why? Let's examine that:

1. 1. Caucus voters must be present at the beginning of the caucus and stay until the end of the caucus. Many caucuses are held starting in the afternoon and extending into the evening hours, splitting shifts. This means that working class shift workers cannot even swap shifts with someone in order to attend, since the caucus cuts across two shifts.
   
2. The length of time a caucus takes place is difficult for the elderly and the infirm to sit or stand for that length of time.
   
3. Arranging for transportation is also difficult, since the event starts in the afternoon and extends through evening. Unless a caucus goer volunteers to transport those without transportation, it would require the caucus goers without a car or the ability to drive or the ability to use public transportation (in some cities this does not extend into the late evening, but ends after the workday), to arrange for transportation with someone who would be required to wait for hours while the caucus is taking place. Or for two people to provide transportation -- one to bring them and one to pick them up and take them home. This is awkward and/or costly.
   
4. Voters with babysitters will have to go to the added expense of not only hiring a babysitter, but arranging for transportation to and from their house.
   
5. Unlike primaries, where absentee voting is allowed and convenient, caucus goers must be "present to win" as the saying goes. Those travelling or in hospice, nursing homes or other confined situations cannot be present and cannot vote absentee.
   
6. Unlike primaries, which have some form of paper ballot or receipt that can be recounted, there is no way to "recount" a caucus.
   

I'm sure there are many other reasons, but I think I have provided enough to prove the point. If any of you have some other reasons or ideas, I would welcome your input.