Eh.
People have been spoiled by the app store. Like I agree its a lot of money, but it also takes a lot of money to live, and if someone is a solo developer for a living then they depend on software sales. Lifetime purchases are tough. Once you get that money, the potential for more money from that customer is gone. Unless you follow a traditional software licensing model where you buy a version and upgrading past a major release requires another purvhase.
Im pretty sure he LJ has taken into account the heavily decreased sales potential of the lemmy market. Hes going to make substantially less sales, so he needs those sales to be worth it, especially if its a lifetime purchase. Its hard to strike a balance between worth it for the customer and worth it for the dev. Ideally the lifetime cost pushes would be purchasers towards an ongoing subscription while still providing value for both parties.
I agree $179aud us too much, and I wont be paying that myself, but I feel for LJ at the same time. Its not going to be easy making the money he may need to continue developing at the same rate.