Given the number of nodes and the amount of hashrate now supporting full RBF, then you can essentially now replace any transaction whether or not it is flagged as RBF, and so stuck transactions should be a thing of the past. If your wallet software does not let you do this, then switch to a better wallet.
o_e_l_e_o, do you know any SPV wallet that allow doing so?
If I am not wrong, to replace a transaction that has not been flagged as RBF with a new one, you have to run your own node, enable FULL RBF, broadcast your transaction and hope that your node connects to a node that has enabled "full RBF".
Correct me if I am wrong, please.