MongoDB is not the new MySQL, because software with as much inertia and adoption as MySQL will not see easy or even complete replacement. Case-in-point: IE6. IE6 is still with us today, as much as we hate it. You can make all the arguments for a modern browser that you want, but businesses and a few people say, "But I like it better."
Are there easy code migrations to MongoDB? No! Are there easy query migrations? Not really. It isn't a linear transition from one to the other. So no only do you have to rewrite your software, but you've got to pitch your SQL references out the window along with your queries.
I believe that Postgres will replace MySQL. It's mature, SQL-based and similar enough that only tweaks are needed to get a code base running. Oh, and it's free.
New projects may support MongoDB, but I'd be surprised if Wordpress ever came out with a version to support it.
MongoDB is not the new MySQL, because software with as much inertia and adoption as MySQL will not see easy or even complete replacement. Case-in-point: IE6. IE6 is still with us today, as much as we hate it. You can make all the arguments for a modern browser that you want, but businesses and a few people say, "But I like it better."
Are there easy code migrations to MongoDB? No! Are there easy query migrations? Not really. It isn't a linear transition from one to the other. So no only do you have to rewrite your software, but you've got to pitch your SQL references out the window along with your queries.
I believe that Postgres will replace MySQL. It's mature, SQL-based and similar enough that only tweaks are needed to get a code base running. Oh, and it's free.
New projects may support MongoDB, but I'd be surprised if Wordpress ever came out with a version to support it.
Just my 2ยข.