That's the danger of direct sequencing. Just wait until someone to come along with hopping that overlaps the frequency and it doesn't work anymore. Other brands might not interfere but there's always a risk.
How is this anyone's false when Spektrum can't cope with interference? If anything doesn't work, just change to something else. I understand the ergonomics and familiarity but if it's too much of a trouble then just move to other brands.