I’ve been running Arch on my Purism Librem 15v3 since I got it seven months ago (transitioned my old install off my DOA t460s) and it works great. Absolutely no issues. In fact since I’m willing to use firmware blobs here and there, I probably have less issues than your average poster here. I have also switched out the wireless card as the one the laptop came with might be free and open but man does it stink.