If uber leaves growth mode and makes smarter investments in new services/markets, they can be profitable. They have positive margin on ridesharing in most markets. I believe uber eats could also earn money in the short term. And I want them to continue investing in last-mile delivery (which I believe they have canceled for now).
Even though eats isn't earning a lot now, I believe that once all the money-burning food delivery startups go out of business and the market price for food delivery is no longer so depressed, it's a solid business Uber can make money on. I would prefer Uber just switch the business off in markets where it's impossible to turn a profit and just restart the networks/ecosystem once delivery prices normalize, but Uber is uniquely strong here because they are the only food delivery platform to also have a huge driver network they can easily tap into.
Last mile delivery is also very synergistic with their business and IMO it's just something they need to spend time on getting right and building relationships with big partners. Once this, eats, and rideshare are all working well together you have a really synergestic business. I think if Uber can pass on the efficiency/demand gains from these three products working in tandem to drivers, they can also work towards building a stronger moat around their network.
AV is the big unknown. However I find it much more plausible that Waymo and Tesla will vendor out the details of the rideshare service rather than build their own from scratch. Going from scratch is kind of risky, because it makes the whole venture dependent on the success of the vertical and requires good execution on getting people to actually use the service - it's much safer to simply sell the tech to automakers, rideshare, etc. since we know there is already demand for it there (I think there are also brand implications to Waymo/Google/Alphabet and Tesla that will make them hesitant to vertically integrate). Uber is of course also working on AV and in their case, they already have the messy business side of that vertical figured out, so I think their upside is a lot higher.