The Firestorm Team believes that if residents can supply "a well structured set of use cases that demonstrate clearly and concisely how useful and valuable this feature is to (us)" Linden Lab may be convinced of the features value and usefulness.
If you use this feature and would like to see it stick around please leave a comment on this post Firestorm: 'Restore to last Position' needs you!, detailing how you use it and why it is valuable to you.
Please note Jessica's sage advice: "Kicking, screaming and calling foul will not save this feature, nor will criticizing LL or anyone else for not understanding the feature. In fact actions like that will speed up its demise."
For an interesting analysis, please go to Inara Pey's blog post: Living in a Modemworld: Firestorm seek feedback on “restore to last position” and the other links Inara provides there.