AC also needs to deal with line resistance, and cheap, efficient multi-MW, multi-kV DC/DC converters aren’t there so far, but there are prototypes (and drop-in transformer replacements https://en.wikipedia.org/wiki/Solid-state_transformer) Advantage is that these converters can be more efficient than transformers and you don’t have to deal with reactive current (if DC). Obvious downside is that frequency control isn’t there
The problem with DC is line resistance. AC has to deal with line impedance, which is much easier on long distance transmission.
AC also needs to deal with line resistance, and cheap, efficient multi-MW, multi-kV DC/DC converters aren’t there so far, but there are prototypes (and drop-in transformer replacements https://en.wikipedia.org/wiki/Solid-state_transformer) Advantage is that these converters can be more efficient than transformers and you don’t have to deal with reactive current (if DC). Obvious downside is that frequency control isn’t there