I currently have two tasks, that both compile sass files. I would still like to concat the two directories into separate files but it seems that it would be more maintainabl
With Gulp4 you can use:
gulp.series for sequential execution   gulp.parallel for parallel execution
gulp.task('default', gulp.series('MyTask001', 'MyTask002'));
gulp.task('default', gulp.parallel('MyTask001', 'MyTask002'));
Article about here
You dont need run-sequence plugin anymore
You need install:
npm install -D gulp@next