Since most of the talk here has been about the Mac side,I thought I would weigh in on the Windows side. 2019.5 seems way more efficient here. At a 64 buffer in any previous version, if I tried to add or just open an instance of Ozone8, it would always stop and throw an error. Now it just does what I want with no fuss at all! Same with Melodyne. And, changing buffers shows insignificant system resource change(maybe 4-5% now vs 25-30% before)