What is one significant shift in material science driving new heat shield development away from the Shuttle era design?

Answer

Moving toward integrated heat shields and advanced ablatives like PICA.

Modern development seeks to move away from the labor-intensive tile replacement cycle by favoring integrated shields or ablatives like PICA, which offer better protection relative to weight.

What is one significant shift in material science driving new heat shield development away from the Shuttle era design?
Aerospaceaeronauticsheat shieldthermal protection systemreentry vehicle