In their try to remove lesser bone and facilitate future revisions, all companies in some stage created short stems. Some of them are still in use, others disappeared due to complications they had. Aesculap, I think, has the longest survivor. The "success story" of every component can be seen in the NJR.
Some interesting papers on the use and details of modern short stems are to be found in the Journal Reconstructive Review edited by Timothy McThigh.
Higher resistance to periprosthetic fractures from torsional forces - JOT 2015 Jones
Less thigh pain, PE, and periprosthetic fractures - JBJS Br 2012 Kim
Similar survival rates at 5y compared to their long-stemmed counterparts 99.2% vs 99.8% at 8.9y JOA 2015 Albers
Good osseointegration in elderly despite poor bone stock - Inter Orthop 2013 Kim
Improved mechanical stresses on host bone at 9y compared to standard stems - OTSR 2013 Cinotti
Solid fixation in osteoporotic bone at 2y, reduces the risk of femoral perforation in osteoporotic patients - CORR 2012 Patel
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