With L grades you will be comfortable with conventional processes and typical procedures, with H grades you need to pay more attention but avoidance of sensitization is still quite achievable. What matters is total time at temperature within the sensitization range. Thickness (i.e., number of passes) will be a factor, and interpass temperature must be restricted.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"