My TIFF's are almost always zip compressed, otherwise they exceed the 4GB TIFF size limit. I do a "save as," right after bringing the RAW ARW file into Photoshop from Lightroom Classic. I realize they might be slower, but I've timed saves to hard disks, my 24TB RAID 5 volume, or the 4TB SSD in my new iMac 2020. They seem to be within a few seconds with each method. Originally I had hoped saves to the RAID or SSD would be faster, it seems logical. Clearly a one layer TIFF will be fast but I choose to keep all my layers. This has proven to be invaluable when going back to older files.