Elon's vision is to take over the world automobile market quickly. It's impressively how close he's come. From zero to #1 since 2012 in premium cars is an almost unbelievable achievement. Originally the plan was announced that the model Y would be produced in new assembly lines in Reno, then later the lower end model Ys would be produced in China.
However since then the model 3, S, and X demand had dropped significantly, at least in the USA. They are developing markets in the EU, but delivery logistics, safety certifications, dealer networks, and related have delayed things. Reduced tax incentives in the USA have also hurt demand locally.
My speculation is that Elon wanted all 4 model 3 assembly model 3 lines in Fremont to stay producing the model 3. But now after Q1 they are considering converting a model 3 line in Fremont to the model Y. This will save significant money since with 75% of the same parts, but of course will reduce model 3 production capacity.
How much this makes sense depends on if Panasonic keep up with the battery demand and how much can the new EU model 3 demand make up for the decreasing USA model 3 demand. I suspect there will be related announcements in the next quarter or so.
As for desperation. They made $3.7B with a 20% margin and just paid off $920M in convertible bonds. They have $2.2B on hand and sold 63,000 model 3s this quarter. Where's the desperation? They promised a model Y (mostly a model 3 with a bit more ground clearance and a slightly taller chassis) in late 2020. I don't really see a problem. Given that they have set up 4 model 3 lines so far, at least one model Y line in 1.5 years seems pretty reasonable.