> Alpro costs like 2.80€/L while common dairy milk is less than a euro per liter

Sure if we are cherry picking the "premium" brand this comparison works. Store brand soy or oat milk are 0,95€[0] and 0,90€[1] per liter respectively, so about what cow milk costs. For milk and milk alternatives there hasn't been a financial differentiator between them for about 5 years now.

With meat replacement patties there is still a significant price difference, though there Beyond Meat is also one of the more expensive ones (which is bold, as they've also been lapped by the competition in taste and variety of products).

[0]: https://www.rewe.de/shop/p/rewe-bio-vegan-soja-drink-1l/5852... - Links may not work depending on what postcode you enter. Should work with 10115

[1]: https://www.rewe.de/shop/p/rewe-bio-vegan-hafer-drink-ohne-z...