Out of curiosity, how many software wallets do you think are truly open-source aside from electrum? I think you can also create a thread listing them all and have it pinned in the wallets board just like dkbit's topic covering open-source hardware wallets. Some members may also contribute to your list.
Well, you are right and I agree with you idea, because looking at this from another angle, this forum is not that populated yet, we already have more than enough boards looking dead, it makes no sense to create even more boards that may like look active only for a few weeks of its creation and then after, go silent with only one or two posts there in a whole week.
There aren't alot of open source bitcoin wallet, personally, I know know about electrum, mycelluim to be open source bitcoin wallet, others I am not sure if they are open source include blue wallet, wasabi, samurai wallet, atomic wallet and a host of others.
And personal, I think that as far as we already have a board for wallet, this can serve for both open source and no open source wallet, there is no need making a separate board or child board for open source wallets.