Its a lot harder to make progress without meat. Can it be done? Yes, but as you probably already know, making progress is hard even with the best amino acids available. If you purposely take these high quality aminos out, your job will be even harder. Thats not to say you will make no progress. If this is important to you, I would just reset your expectations on progress. If you just want to look ok and not out of shape, this will be fine as long as you put a lot of effort into your nutrition. If you want to grow a good amount of muscle though, you may find you have a much harder time achieve what you want to achieve. Mainly the issue that comes up is that the few quality protein sources you have left need to be used so regularly, you can start to suffer burn out. Eggs and whey get old when you’re eating them all day and many plant based proteins have extra carbs. I have seen a Pea Protein Isolate. Since its an iso, the remaining carbs are removed. You can also look into digestive enzymes that will help you get the most out of the foods you are eating.