Do all embassies require an interview for Thai visas?

The necessity of an interview for visa applications related to Soft Power in Thailand seems to vary based on the embassy. Some embassies routinely require an interview, while others do not. For instance, it is not common outside Laos, and if one uses an agent, an interview may be bypassed. However, for personal applications, there may be a 50/50 chance of needing an interview.