[TheNewAndy]

Have you seen how thick the librem 5 is? I think it is think because of the two m.2 slots in it, but I don't think you would want it any thicker.

[etbe]

It is thick for many reasons, having separate chips for security means a bigger motherboard, having a socket for a security chip, etc. But the battery is really big, much bigger than is common for modern phones.