My first T had a completely different line of work which caused him to travel and I found myself sidelined and not prioritised more than once which was hurtful.
My current T does several roles within the field of psychotherapy, so he writes, he conducts workshops, he supervises, he coaches etc etc. He also travels a lot but he always makes sure to be available for me and/or give me months of advance warning if he's not going to make our appointment. I don't know if it's so much about the job as about who he is as a person. He sees the importance of consistency for me and makes sure to provide it.