Nice speech Felix. I understand your point of view...I just have one question for multisites.
Lets say that I use site links. What I see is that all links keep the same SiD. As for session id there are some configurations in admin->configuration->sessions, that one of them has to do with session recreation; should this be set to false ?
Never try to change it. Why do you ask this question ? is that because the site links don't work ?
gives the priority to the SiD parameter instead of the cookie for the session creation... This is how the site_links works, by keeping the same session through this link. I did it because the cookies are made for one domain, therefore, the 2nd site can't read a cookie of the first site.
I haven't installed this module yet, but I would like to know whether we can have 2 different shipping locations? site 1 for US location and site 2 for Canada.
By having 2 shipping location, I can have Canada Post module for Canada and USPS module for USA.
Currently,I have 1 site with 2 ZenCart installation with 2 separate database.
Yes, you can override the shipping configuration from the config file of a site (folder "config_sites")
However, I think that you can also specify a shipping in Zencart that is relevent of the country of the customers. In this way, the shipping to US and to Canada will work to both of your sites.
You have to duplicate the whole folder of your shop.Well, knowing that I can not manage my subdomains, what files should I duplicate to make multisite work ?
Also, you have to think of changing the site location from the config file of each shop ...