I couldn't care less about McDonalds, but if they commit to going plant-based by 2025, they will not stop there. Eventually they'll be blockading supermarket chains and probably even demonstrating outside your local butchers.
https://www.theguardian.com/uk-news/2021/may/22/animal-rights-protesters-blockade-four-mcdonalds-distribution-centres-in-uk
https://www.theguardian.com/uk-news/2021/may/22/animal-rights-protesters-blockade-four-mcdonalds-distribution-centres-in-uk