Electrothermal-chemical guns between cannon and railgun

What advantages and disadvantages do electrothermal-chemical guns have compared with railguns?

They improve conventional propellant performance with lower power demands, but impose difficult heat-management and barrel-life problems.

The system uses electrical energy and plasma to ignite and control a conventional propellant charge more precisely. That can raise performance without requiring the very large capacitors and electrical generation demanded by a railgun. It is an evolutionary technology rather than an entirely new projectile mechanism, which makes it easier to integrate into tanks, aircraft, or ships. Its penalty is intense heat and a different form of barrel wear, so practical weapons need effective cooling and durable materials. It appears more achievable in the short to medium term, while sustained naval railgun fire may eventually push surface combatants toward nuclear power.