Blenders curve objects got some long overdue updates in the last couple of months, improving their robustness and utility. But one features is still a mystery: Half spheres as end caps for each separate, non-closed spline. There have been multiple efforts in the past to make round caps more accessible and even natively implemented.

“The quest for round cap curves” by Alexander Mitzkus
Blender Conference 2022
2022-10-27 12:30 at the theater.