Simply because I have not had any problem with MCP2562. If you check posts others have had some problems with SN65HVD230 and then switched to MCP2562. Maybe they have connected it wrong and burned it or what ever. MCP2562 works with both 5V and 3.3V as far one connects Vio to used IO level. Now I have started to use ISO1050 to isolate device from bus.