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The Square Kilometre Array (SKA) will answer fundamental questions about the origin, evolution, properties, and influence of magnetic fields throughout the Universe. Magnetic fields can illuminate and influence phenomena as diverse as star formation, galactic dynamics, fast radio bursts, active galactic nuclei, large-scale structure, and dark matter annihilation. Preparations for the SKA are swiftly continuing worldwide, and the community is making tremendous observational progress in the field of cosmic magnetism using data from a powerful international suite of SKA pathfinder and precursor telescopes. In this contribution, we revisit community plans for magnetism research using the SKA, in light of these recent rapid developments. We focus in particular on the impact that new radio telescope instrumentation is generating, thus advancing our understanding of key SKA magnetism science areas, as well as the new techniques that are required for processing and interpreting the data. We discuss these recent developments in the context of the ultimate scientific goals for the SKA era., The Dunlap Institute is funded through an endowment established by the David Dunlap family and the University of Toronto. B.M.G. and J.L.W. acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) through Grant RGPIN-2015-05948 and of the Canada Research Chairs program. I.A. acknowledges support by a Ramón y Cajal grant (RYC-2013-14511) of the “Ministerio de Ciencia, Innovación, y Universidades (MICIU)” of Spain, financial support from MCIU through Grant AYA2016-80889-P, and through the “Center of Excellence Severo Ochoa” award for the Instituto de Astrofísica de Andalucía-CSIC (SEV-2017-0709). A.B [asu]. acknowledges financial support by the German Federal Ministry of Education and Research (BMBF) under Grant 05A17PB1 (Verbundprojekt D-MeerKAT). A.B. (Andrea Bracco) acknowledges the support of the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 843008 (MUSICA). M.H. acknowledges funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 772663). M.P. acknowledges funding from the INAF PRIN-SKA 2017 program 1.05.01.88.04. F.P. acknowledges support from the Spanish Ministerio de Ciencia, Innovación y Universidades (MICINN) under Grant Numbers ESP2015-65597-C4-4-R and ESP2017-86852-C4-2-R. M.R. acknowledges the “Departments of Excellence 2018-2022” grant awarded by the Italian Ministry of Education, University and Research (MIUR) L. 232/2016; Research grant TAsP (Theoretical Astroparticle Physics) funded INFN; Research grant “Deciphering the high-energy sky via cross correlation” funded by the agreement ASI-INAFn. 2017-14-H.0; research grant “From Darklight to Dark Matter: understanding the galaxy/matter connection to measure the Universe” No. 20179P3PKJ funded by MIUR. C.J.R. acknowledges financial support from the ERC Starting Grant “DRANOEL”, Number 714245. Partial support for L.R. comes from U.S. National Science Foundation Grant AST17-14205 to the University of Minnesota. J.M.S. acknowledges the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), 2019-04848. X.S. is supported by the National Key R&D Program of China (2018YFA0404602). S.S. acknowledges support from the Science and Engineering Research Board (SERB) of the Department of Science and Technology (DST), Govt. of India, through Research Grant ECR/2017/001535. F.V. acknowledges financial support of the H2020 initiative through the ERC Starting Grant MAGCOW(714196).