Bugs a go go
Well I bought Kylix - wrote most of our hotel management and pos software with it and still use it although Lazarus looks to be less bug ridden and more importantly not obsolete.
One of the main problems with Kylix is that is was only certified to work on distros of Linux which were old when Kylix came out and are now really old. With a bit of fiddling it's possible to get it to work on other distros, but it's an uphill struggle. Any software that allows Pascal/Delphi programming on Linux is welcome here!