Another view point that was mentioned in this podcast was what the broker optimises.
For example a broker charging a monthly flat fee is more aligned to long term investing as they are not incentivised to optimise frequent short-term trading, while a per/trade broker maybe wants higher volumes of trading, so might optimise short-term, frequent trading.
Of course it’s up to the individual on what they choose to do, so just because you can, doesn’t mean you will, but it’s always good to align interests.