I have been a long time user of edge and one of the best features that I would tell people about is the pdf reader being amazing. After trying out the new pdf reader by switching on the flag I feel like I might have to switch away from using edge. I don't see what benefit that this change makes to the users, but I could accept the addition of "Visually, users will see an unobtrusive Adobe brand mark in the bottom corner of their PDF view." as the read aloud feature of the edge pdf reader is still hands down the best one on the market. However, I HATE the fact that now there will be an ad that pops up each and every time that i use it telling me to purchase an adobe subscription. I am a paying customer of Microsoft 365, I am not ever going to go back to being a creative cloud user. I have advocated for people to switch to edge as it does a good job blocking intrusive ads, if this change roles out i will never do that again and might have to change to a different browser and pdf reader.